WEBVTT

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you are now unmuted

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okay can you guys hear me yeah

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can you guys hear me sir yep I can and

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we're live so take it away okay

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so um hello everyone my name is ferming

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I'm a programmer

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a math student from spain I've been

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using me e-max for

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two years now more or less and today I'm

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going to talk about

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a maxima computer algebra system in 2

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max

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so let's talk about what is maxima

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well maxim is a system for manipulation

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of symbolic and numerical expression

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and it's similar in some regard to

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octave

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and it's also free software is derived

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from the maxima from the 60 from the m80

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and it's written in common lisp which is

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a language that I really

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like I enjoy writing it so for me it's a

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plus

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okay so let's talk about the initial

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support for maxima when I first started

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using it I looked for support into Emacs

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and I found that

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there's two major modes in the main

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repository of maxima

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for remax the first one is imaxima which

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I don't know too much about it

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and the second one is maxima dot l which

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is the one I took first

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and it was pretty nice has like a major

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mode a minor mode

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a nice ripple but it also has some

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disadvantage

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and the first one is that is quite

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outdated I think

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it was from the 2007

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so it's not tested with the current

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email version and the second one

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is that it doesn't use modern e-max

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capability

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I'm talking for example about the last

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or more latex preview

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from the last a max 27.1 I think

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and that's why is that they know

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integrated with common third party

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extension I'm talking about company for

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example third party

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yeah you know the alpa melba packages

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so uh this stock is going to be divided

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in two parts the first one is going to

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be how I maximize my date today

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in max exercise don't worry it's going

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to be

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quite easy and the second one is going

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to be why for the package

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and the list improvement that I did and

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a couple of things more maybe the future

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and where's the package right now if you

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can use it so

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let's talk about the workflow so right

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out of the box it has like an

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orimal support I didn't write this it

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was already

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in Emacs

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so that's pretty nice let's go with a

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simple example

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okay so this is an array of three

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equations and three variables

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so it's a system that can be solved and

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the solution is unique

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um so we're going to solve it right

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let's go

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solutions okay here's how you define a

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variable

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in it's called solve okay

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it's called implicit explicit

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sorry okay and now an array of

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our variables actually okay

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so first of all we have to send this

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variable to the maxima

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repo with we can do that with ctrl c

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control c

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or with the maxima send line

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okay so let's um let's put the maxima

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buffer right here

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okay let's so um

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right now we can get the solution like

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this so we call already

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uh we call this line right now control

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sequence to c

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as you can see we get like an array

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inside an array because

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uh let's see why we get this so we can

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call maxima

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help a point this will open a

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dock um buffer with all information

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about the

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solve function so we can see that this

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list of solution equations

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you can see it okay so but we no we know

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that this system only have one solution

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so we're only interested in the first

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one we can do this like pretty easily

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just to take the first one

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we can send it to the buffer so this is

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quite easy example as you can see

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they have to completion much of the help

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facilities that we have

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we can also get information about the

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symbol for example maxima

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symbol doc and we get in the and now you

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can see

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correctly in the mini buffer all the

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possible

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um parameter of the function

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right so let's continue

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okay so let's go to a more well

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complicated example to say oops

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okay so we have this

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equation and we want to go from -1 to 5

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I want to show in a nice

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graph right first of all we begin

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sending this line to the

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maxima ripple hold it button again

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okay um so this is not ideal if you want

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to write down this equation because

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it's quite messy what is when so

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uh what's thing are where so we can call

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the function maxima

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let's say insert form okay

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and this is more easy this basically put

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text behind

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and led or mode to render it and this is

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quite easy to

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write down you can use it like in every

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expression so um first we have to call a

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library

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let's load the library library draw

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we have also completion for local

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variable and local

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libraries sorry let me try to finish

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draw okay and we send the line

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so right now we have a leverage and we

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should even have auto completion for the

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library function

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okay we have let's call draw2d

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and now we can call implicit we should

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have

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okay and we can I mean put the variable

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of equations we put the first variable d

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minus

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five d five five

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the v variable the minus five and the

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five

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okay it should be all all good so let me

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try to send it

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okay you cannot see it right now because

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I'm just sharing the maxima screen let

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me try to change that

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okay um

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okay can you plot hello

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okay so this is basically the graph that

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I can upload generates

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uh right now it's not integrated into

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into the maximum package but it's a work

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in progress

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so let's go back to Emacs

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uh where are you okay there you are okay

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okay so um

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let's continue so uh this is some of the

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things that you can use

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for your day-to-day programming in

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maxima

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let's go now with the

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okay as you can see this is just text

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that is render

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okay let's go within a slide this is how

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I use maxima a simple example you don't

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want to

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talk too much about it because everyone

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use the package in a different way

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so right now I'm going to talk about the

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original package and

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the way I change it right so the

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documentation

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of the original was great but for me it

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wasn't embedded in the code

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it was something sometimes hard to read

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like it was like a big

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chunk of comment it gave me all the

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information

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like um for me that's too much I prefer

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a cohesive small comment and then a big

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redmi will order

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all the links and information so that's

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one of the first thing I

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change um then also completion I'm a big

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fan

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I'm used to slime so I'm I love

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great auto completion so um the first

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thing that I noticed that well

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it uses an absolute function I don't

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know if you can see correctly okay

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comment dynamic is deprecated and it

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also have like this

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variable which is maximus symbol which

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is basically a big

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list of all the possible completions so

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if I load the library it's not aware of

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the new symbols or even if I

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create a variable it's not loaded so

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it's not dynamic

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so I want the first thing I want is

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dynamic completion right

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so I improve it which wasn't that hard

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I first of all create maximum completion

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which we're going to see in a moment

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and then it changes completion region so

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this is the

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improved version but the good thing is

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like I decoupled the completion function

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so I make that you can use it on your

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own so you get a prefix

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which is um like

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the thing that you're going to also

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complete you get the inferior process

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which I'm going to talk about later but

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basically it's a maxima process you can

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work with

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and you get an optional argument which

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is fuzzy finding

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okay so you can easily send a block here

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what

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uh with the propos which is a maxima

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command that gets you

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all the auto completion and then you

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process the

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the output and you return a list

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of possible completion this function can

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be easily put into

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company as you can see you just

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get maximum auxiliary inferior process

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is a process that just

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uses sorry I have of

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all the apropos and the get that symbol

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it's like uh

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like you say auxiliary let's help me uh

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for that dirty stuff

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so and process manipulation let's talk

00:09:43.680 --> 00:09:44.640
about

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how the maxima process was in the

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beginning

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so at first it was just one process and

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you send all of the things there

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and you move the processor here and

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there and

00:09:56.320 --> 00:09:58.160
there was a global state right so all

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the function depends on

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variable global variables and I don't

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like that approach I prefer more like a

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shirt to say functional like you sense

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one of things and you return

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something so it's not like a void

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function so to say

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so I change it recipe uh well this is

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the maxima start function now

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let's just create a startup process with

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this function which is maxima make

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inferior

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so this function just gets a name

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and it return a process of maxima and

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you can then manipulate it the way you

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want

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let's see a better version so this is

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the opposite right this

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remove an inferior process and delete

00:10:39.200 --> 00:10:41.760
the process and kill the buffer

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right so let's give an example because

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this you can see pretty easily in this

00:10:45.519 --> 00:10:46.399
example

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so I want to go to the scratch buffer

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which I think you can see it better

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okay so this is the way you can get a

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process with your name

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and save it into a variable right let's

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execute this so as you can see well

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I don't know if you can see big you get

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a process

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let's go to it the process called my

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maxima

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as the buffer right and if we can you

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can send

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stuff to the process right we can call

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maximus in block get a block of valid

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maxima code and just pass the variable

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the process

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and we send code to the process right we

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can

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this is useful if you have some

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expensive computation that you want

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to process laser to say so the process

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can manage it

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and when you get the results correctly

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you can also get the result from the

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process

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I mean I don't put it here but quite

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easy and then you

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removed in favor which is the way to get

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rid of the process

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and the buffer so if we call this

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function we should get rid of the

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this process and it works the processing

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is no longer

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I'm happy to continue so um

00:11:54.160 --> 00:11:56.160
other things that improve the package on

00:11:56.160 --> 00:11:57.680
my commitment during time

00:11:57.680 --> 00:11:59.760
I'm going good okay another thing that I

00:11:59.760 --> 00:12:01.360
did to the package was to add

00:12:01.360 --> 00:12:02.560
continue integration and continue

00:12:02.560 --> 00:12:04.959
delivery right so the package didn't

00:12:04.959 --> 00:12:06.320
have any tests

00:12:06.320 --> 00:12:09.440
and the code was a little bit messy so

00:12:09.440 --> 00:12:12.959
I add integration a test

00:12:12.959 --> 00:12:16.560
and test with the test simple framework

00:12:16.560 --> 00:12:19.519
from rocky bursting the maintainer of

00:12:19.519 --> 00:12:20.560
real

00:12:20.560 --> 00:12:23.279
good which is a great package by the way

00:12:23.279 --> 00:12:24.079
um

00:12:24.079 --> 00:12:25.920
yeah this is one example of the process

00:12:25.920 --> 00:12:28.079
so right now because um

00:12:28.079 --> 00:12:29.760
the infrastructure of the process

00:12:29.760 --> 00:12:31.680
management is decoupled

00:12:31.680 --> 00:12:33.680
so I can test it pretty easily this is

00:12:33.680 --> 00:12:35.200
the test function of the

00:12:35.200 --> 00:12:37.519
inferior running so I can check if an

00:12:37.519 --> 00:12:39.519
inferior is running right now

00:12:39.519 --> 00:12:41.440
and I can just delete it after and get

00:12:41.440 --> 00:12:43.200
the results

00:12:43.200 --> 00:12:45.279
and I also did some integration with the

00:12:45.279 --> 00:12:46.959
party packages the first one company of

00:12:46.959 --> 00:12:48.639
course I love auto completion

00:12:48.639 --> 00:12:50.880
the second one was hormone that was

00:12:50.880 --> 00:12:53.839
already there and latex with the

00:12:53.839 --> 00:12:56.880
um or logic insert form

00:12:56.880 --> 00:13:00.079
and with poly mode because um let me

00:13:00.079 --> 00:13:02.959
evaluate this maxima can understand lisp

00:13:02.959 --> 00:13:03.680
code

00:13:03.680 --> 00:13:06.959
well more or less it has like a

00:13:06.959 --> 00:13:10.000
function so to say that you can send a

00:13:10.000 --> 00:13:11.279
list command to the

00:13:11.279 --> 00:13:13.600
maxima rebel and you can understand it

00:13:13.600 --> 00:13:14.480
in some way so

00:13:14.480 --> 00:13:17.839
we can go to the maxima poly

00:13:17.839 --> 00:13:20.959
only maxima right you enable polymaxima

00:13:20.959 --> 00:13:22.800
and it creates a polymode

00:13:22.800 --> 00:13:25.519
which this is lisp code and this is

00:13:25.519 --> 00:13:26.399
maxima code

00:13:26.399 --> 00:13:28.639
so we can send this to the maxima ripple

00:13:28.639 --> 00:13:30.560
we come to c control r which

00:13:30.560 --> 00:13:34.240
it sends the um the current

00:13:34.240 --> 00:13:37.760
um area region sorry

00:13:37.760 --> 00:13:40.160
and we define a variable which is called

00:13:40.160 --> 00:13:41.839
test and as we can see we have the

00:13:41.839 --> 00:13:44.000
variable test right here so you can

00:13:44.000 --> 00:13:47.360
program in lisp and you can send it to

00:13:47.360 --> 00:13:48.079
maxima

00:13:48.079 --> 00:13:50.399
so this is pretty good pretty nice um

00:13:50.399 --> 00:13:51.920
working integration with

00:13:51.920 --> 00:13:55.040
the slime mode and with swank so you can

00:13:55.040 --> 00:13:57.120
actually have a completion of

00:13:57.120 --> 00:13:59.120
a function inside the maximal list

00:13:59.120 --> 00:14:00.959
package but

00:14:00.959 --> 00:14:02.800
this is going to take quite a while

00:14:02.800 --> 00:14:04.399
because it's not trivial

00:14:04.399 --> 00:14:07.360
so um we're the feature of maxima right

00:14:07.360 --> 00:14:09.440
now well we have fonts highlighting

00:14:09.440 --> 00:14:11.519
smart indentation uh it was already in

00:14:11.519 --> 00:14:14.480
the package but now it's quite better

00:14:14.480 --> 00:14:16.880
great help functions right now I can

00:14:16.880 --> 00:14:18.160
find the recommendation quite

00:14:18.160 --> 00:14:20.800
fast and currently the menu integration

00:14:20.800 --> 00:14:22.160
this is quite basic it needs to be a

00:14:22.160 --> 00:14:23.120
little bit improved

00:14:23.120 --> 00:14:25.199
uh latex support also completion the

00:14:25.199 --> 00:14:26.720
company and maximizer process

00:14:26.720 --> 00:14:28.480
integration and mini buffer I didn't

00:14:28.480 --> 00:14:29.120
show you

00:14:29.120 --> 00:14:32.880
but basically if you call global maxima

00:14:32.880 --> 00:14:34.639
minor mode you have the minor mode you

00:14:34.639 --> 00:14:36.720
call maxima mini buffer

00:14:36.720 --> 00:14:38.399
how are you okay mini buffer you can

00:14:38.399 --> 00:14:40.720
basically just write simple maxima

00:14:40.720 --> 00:14:42.720
command and it will give you the result

00:14:42.720 --> 00:14:45.920
this is like a permanent version of um

00:14:45.920 --> 00:14:48.959
calc so you can do it you write the

00:14:48.959 --> 00:14:50.560
command and you get the output uh way

00:14:50.560 --> 00:14:52.320
more to come I have like a list

00:14:52.320 --> 00:14:56.079
of issues that I put enhancement a new

00:14:56.079 --> 00:14:58.880
feature that I'm going to develop

00:14:58.880 --> 00:15:01.199
so uh the future under presence of the

00:15:01.199 --> 00:15:03.120
package well the package is right now

00:15:03.120 --> 00:15:06.880
melpa a melba stable um

00:15:06.880 --> 00:15:10.720
in this 0.7.6 version

00:15:10.720 --> 00:15:13.360
and I'm planning to include into the

00:15:13.360 --> 00:15:15.279
known canoe alpha

00:15:15.279 --> 00:15:16.720
this is the url of the package by the

00:15:16.720 --> 00:15:18.959
way so you can if you go to metapod you

00:15:18.959 --> 00:15:20.079
put maxima and

00:15:20.079 --> 00:15:22.160
you can download it it doesn't have too

00:15:22.160 --> 00:15:23.199
much dependencies

00:15:23.199 --> 00:15:26.639
you aware of that um and thank you very

00:15:26.639 --> 00:15:27.120
much

00:15:27.120 --> 00:15:28.720
uh this is going to be my talk these are

00:15:28.720 --> 00:15:30.959
my uh information

00:15:30.959 --> 00:15:33.519
this is my gitlab this is my page which

00:15:33.519 --> 00:15:34.000
I don't

00:15:34.000 --> 00:15:37.120
love too much and this is my email

00:15:37.120 --> 00:15:40.240
so um thank you very much and I will be

00:15:40.240 --> 00:15:41.839
answering some questions right now

00:15:41.839 --> 00:15:45.600
and happy hacking

00:15:45.600 --> 00:15:49.600
you are now unmuted thank you very much

00:15:49.600 --> 00:15:52.720
vermin for the great talk um okay yeah

00:15:52.720 --> 00:15:55.759
let's see if you have any questions

00:15:55.759 --> 00:15:58.800
uh yeah I'm reading like this um

00:15:58.800 --> 00:16:01.759
so I'm a buddy october usually right now

00:16:01.759 --> 00:16:04.560
okay

00:16:04.560 --> 00:16:06.880
maxima over october yep there are a

00:16:06.880 --> 00:16:08.639
couple questions

00:16:08.639 --> 00:16:11.519
wow maxima we're okay I don't want to I

00:16:11.519 --> 00:16:12.160
don't know

00:16:12.160 --> 00:16:13.940
october that much um

00:16:13.940 --> 00:16:15.680
[Music]

00:16:15.680 --> 00:16:17.839
like I use it like a couple of times but

00:16:17.839 --> 00:16:18.880
I'm not happy

00:16:18.880 --> 00:16:24.000
and I found the octave packets to be

00:16:24.000 --> 00:16:27.120
quite a little bit harder to understand

00:16:27.120 --> 00:16:31.519
and also that

00:16:31.519 --> 00:16:33.839
it didn't have too much features like I

00:16:33.839 --> 00:16:35.680
prefer the maximum used to

00:16:35.680 --> 00:16:37.839
maybe octave is better I don't I'm not

00:16:37.839 --> 00:16:38.880
100 sure

00:16:38.880 --> 00:16:40.800
I know that you can use it for similar

00:16:40.800 --> 00:16:42.079
stuff but

00:16:42.079 --> 00:16:47.120
that's it so sorry

00:16:47.120 --> 00:16:50.959
okay I'm in a little bit of a rush sorry

00:16:50.959 --> 00:16:54.079
let me drink a little blue okay

00:16:54.079 --> 00:17:00.639
okay

00:17:00.639 --> 00:17:05.280
okay how does maxima compare to sagemath

00:17:05.280 --> 00:17:08.959
in imax

00:17:08.959 --> 00:17:13.360
I mean I don't know what is sage

00:17:13.360 --> 00:17:17.439
math I'm sorry um so I cannot answer

00:17:17.439 --> 00:17:18.079
your question

00:17:18.079 --> 00:17:21.839
with your question I think um

00:17:21.839 --> 00:17:25.039
sorry but I mean maxima is ready in

00:17:25.039 --> 00:17:26.720
combo list that's just a preference for

00:17:26.720 --> 00:17:28.000
me because I like

00:17:28.000 --> 00:17:31.120
lisp dialect and common lisp is

00:17:31.120 --> 00:17:36.400
interesting um

00:17:36.400 --> 00:17:40.480
yeah do you plan to

00:17:40.480 --> 00:17:42.720
I mean a maximum organization for maxima

00:17:42.720 --> 00:17:43.840
code block

00:17:43.840 --> 00:17:47.360
yes I want to improve the um

00:17:47.360 --> 00:17:50.720
of maxima package but I didn't have

00:17:50.720 --> 00:17:52.000
enough time and I want to

00:17:52.000 --> 00:17:54.400
clear a little bit of the code because

00:17:54.400 --> 00:17:58.000
still right now

00:17:58.000 --> 00:18:00.080
the code is quite messy in some areas

00:18:00.080 --> 00:18:02.080
because I pretty much implement first

00:18:02.080 --> 00:18:03.520
the base function I want to

00:18:03.520 --> 00:18:05.600
build on top of so right now it's quite

00:18:05.600 --> 00:18:07.120
usable but I still have something that I

00:18:07.120 --> 00:18:07.919
want to improve

00:18:07.919 --> 00:18:11.120
so when I finish that I will

00:18:11.120 --> 00:18:14.799
improve the normal version I think

00:18:14.799 --> 00:18:16.640
it's maximizing to get into into your

00:18:16.640 --> 00:18:18.640
opinion yes I

00:18:18.640 --> 00:18:21.200
I think that the creator of maxima like

00:18:21.200 --> 00:18:21.919
have this

00:18:21.919 --> 00:18:26.640
lisp mine and probably

00:18:26.640 --> 00:18:29.520
that they if you go to a symbol you get

00:18:29.520 --> 00:18:30.559
all the information

00:18:30.559 --> 00:18:33.520
and that reflects that you can actually

00:18:33.520 --> 00:18:36.480
write your program of maxima into

00:18:36.480 --> 00:18:40.000
um into lisp literally because they have

00:18:40.000 --> 00:18:40.799
a command

00:18:40.799 --> 00:18:42.480
so I think that is quite easy to get

00:18:42.480 --> 00:18:44.880
into some university use it for

00:18:44.880 --> 00:18:48.240
um first um

00:18:48.240 --> 00:18:51.200
years so it's quite easy and I think

00:18:51.200 --> 00:18:53.039
with my package you can use it

00:18:53.039 --> 00:18:56.640
like pretty pretty easily just create a

00:18:56.640 --> 00:18:58.960
file and you can start typing and

00:18:58.960 --> 00:19:00.880
maximize quite easy to install also

00:19:00.880 --> 00:19:04.400
so I think yeah it's crazy and

00:19:04.400 --> 00:19:07.600
the page should restart I don't know why

00:19:07.600 --> 00:19:18.320
sorry

00:19:18.320 --> 00:19:22.559
strict in fixed lisp syntax

00:19:22.559 --> 00:19:25.440
you're talking about the maxima itself

00:19:25.440 --> 00:19:26.240
syntax

00:19:26.240 --> 00:19:27.760
or I don't understand the question

00:19:27.760 --> 00:19:32.240
correctly

00:19:32.240 --> 00:19:33.679
well I'm going to go to the next

00:19:33.679 --> 00:19:35.440
question is there

00:19:35.440 --> 00:19:37.360
support for images in maximum mode not

00:19:37.360 --> 00:19:38.880
right now

00:19:38.880 --> 00:19:45.280
the way I want to implement some imax

00:19:45.280 --> 00:19:49.120
things uh is there support for

00:19:49.120 --> 00:19:51.280
but right now it doesn't have like a if

00:19:51.280 --> 00:19:53.360
you could want to have a new plot

00:19:53.360 --> 00:19:55.600
um inside you buffer right now it's not

00:19:55.600 --> 00:19:56.720
possible so

00:19:56.720 --> 00:19:59.360
that's the thing that I maximized that

00:19:59.360 --> 00:20:01.200
maxima.l still doesn't

00:20:01.200 --> 00:20:03.520
do which university you start to use

00:20:03.520 --> 00:20:04.720
maxima um

00:20:04.720 --> 00:20:08.799
in this aragosa university from spain

00:20:08.799 --> 00:20:11.840
they used to maximize the um thing in

00:20:11.840 --> 00:20:12.640
the engineer

00:20:12.640 --> 00:20:16.400
and in the math also so I'm 100 sure

00:20:16.400 --> 00:20:18.320
right now but when I started

00:20:18.320 --> 00:20:19.679
are you planning to option your package

00:20:19.679 --> 00:20:22.559
into maxima um I don't know about that

00:20:22.559 --> 00:20:25.440
because uh maybe can be a little bit

00:20:25.440 --> 00:20:26.320
messy

00:20:26.320 --> 00:20:30.720
um because the maxima ripple is more

00:20:30.720 --> 00:20:32.960
built around like maxima itself and they

00:20:32.960 --> 00:20:33.360
don't

00:20:33.360 --> 00:20:37.600
update the interfaces that much

00:20:37.600 --> 00:20:42.240
I have no problem like it's okay it just

00:20:42.240 --> 00:20:45.360
you have to um if you want to push you

00:20:45.360 --> 00:20:46.320
can push in other

00:20:46.320 --> 00:20:48.480
repository I mean it's just changed the

00:20:48.480 --> 00:20:49.520
file another way

00:20:49.520 --> 00:20:52.880
but also the test um is going to be a

00:20:52.880 --> 00:20:54.080
little bit harder because I think

00:20:54.080 --> 00:20:55.200
they're using

00:20:55.200 --> 00:20:59.120
search for and I'm using

00:20:59.120 --> 00:21:01.200
git lab continue integration within the

00:21:01.200 --> 00:21:02.159
jury

00:21:02.159 --> 00:21:06.799
so yeah I don't think that now unmuted

00:21:06.799 --> 00:21:10.799
yeah it will be nice

00:21:10.799 --> 00:21:12.799
okay um it's possible to include

00:21:12.799 --> 00:21:14.840
maximizing or false similar to jupiter

00:21:14.840 --> 00:21:16.480
notebooks

00:21:16.480 --> 00:21:19.919
um I mean you can uh use maximize your

00:21:19.919 --> 00:21:23.280
or files and you have maximum l mod

00:21:23.280 --> 00:21:26.320
integrated and you can like create put

00:21:26.320 --> 00:21:31.520
that code into a buffer and then

00:21:31.520 --> 00:21:34.400
uh edited correctly but it is now not it

00:21:34.400 --> 00:21:36.159
doesn't have like all the features like

00:21:36.159 --> 00:21:37.679
other languages because

00:21:37.679 --> 00:21:40.480
right now uh as my understanding is

00:21:40.480 --> 00:21:42.320
quite basic so I still have some

00:21:42.320 --> 00:21:45.440
still needs some some stuff some work

00:21:45.440 --> 00:21:47.919
around

00:21:47.919 --> 00:21:52.320
okay I think that's it

00:21:52.320 --> 00:21:56.320
you are now unmuted

00:21:56.320 --> 00:21:59.600
yep so that's it uh thank you very much

00:21:59.600 --> 00:22:01.919
fermin for your live talk and for you

00:22:01.919 --> 00:22:04.640
know the live q a

00:22:04.640 --> 00:22:07.679
thank you all amazing uh max conf

00:22:07.679 --> 00:22:09.840
cheers thank you it's thanks to you all

00:22:09.840 --> 00:22:10.720
you guys

00:22:10.720 --> 00:22:16.840
it's awesome okay thank you cheers bye

00:22:16.840 --> 00:22:19.840
bye