Re: [Jprogramming] Implicit functions

2020-11-05 Thread arie groeneveld
Hi Mike, FYI https://pari.math.u-bordeaux.fr/paridroid/ cheers @@i Op 05-11-2020 om 19:31 schreef 'Michael Day' via Programming: FWIW, I've played around with your (Piet's) example in J and Pari-GP, which is free. Pari-GP doesn't itself run on Android or iOS phones & tablets,  but can be run

Re: [Jprogramming] Implicit functions

2020-11-05 Thread Jan-Pieter Jacobs
When I needed symbolic maths, I used https://wxmaxima-developers.github.io/wxmaxima/ which is derived from the original Macsyma. It comes in a quite nice environment that does decent formatting (LaTeX style) of the output. I would recommend it (esp. if you want to stick with free/open source softwa

[Jprogramming] J902-beta-l available

2020-11-05 Thread Eric Iverson
J902-beta-l available for windows/macos/linux. If you already run 902-beta, then upgrade is easy: load'pacman' 'upgrade'jpkg'jengine' -- For information about J forums see http://www.jsoftware.com/forums.htm

Re: [Jprogramming] Implicit functions

2020-11-05 Thread 'Michael Day' via Programming
FWIW, I've played around with your (Piet's) example in J and Pari-GP, which is free. Pari-GP doesn't itself run on Android or iOS phones & tablets,  but can be run via SAGE as far as I understand my iPad! The J is pretty messy and hardly general!   But normal stuff... NB. General expression f

Re: [Jprogramming] Implicit functions

2020-11-05 Thread 'Pascal Jasmin' via Programming
My approach that suits J ways of solving a much wider class than just this type of problem.  Relies on 2 pretty simple independent concepts. 1. I define a  "perfect function" as simply a function that returns all of its arguments.  This is suitable to processing by many J techniques such as ^: t

Re: [Jprogramming] Implicit functions

2020-11-05 Thread Hauke Rehr
maybe that’s not a question for this forum but since you already mentioned a couple of systems: How do GAP and Sage compare in this regard? I’d have expected them to be competitive in this field as well. Am 05.11.20 um 17:24 schrieb Henry Rich: > There are real experts about this on this list, an

Re: [Jprogramming] Implicit functions

2020-11-05 Thread Henry Rich
There are real experts about this on this list, and I am not among them; but when I was teaching Calc 3/Linear Algebra I looked around for symbolic-math packages & found 3 to be highly regarded: Mathematica, Maple, and MACSYMA.  Each has its adherents, but MACSYMA is free, so the class used tha

Re: [Jprogramming] Implicit functions

2020-11-05 Thread David Lambert
I recommend mathematica as a good choice for symbolic algebra, and keep a Raspberry Pi which came with mathematica in the software distribution. For simple problems wolframalpha.com suffices. At wolframalpha.com try Solve[(x^2+Log[y])^(1)==c,x] and Solve[(x^2+Log[y])^(1)==c,y] Mathematica can exp

Re: [Jprogramming] Implicit functions

2020-11-05 Thread Clifford Reiter
In general, global root finding is a hard problem to solve. One can get a general feel for solutions with a contour plot. I recall this is possible with plot though I don't recall the syntax off hand. On the other hand, from FVJ4 5.3 load 'graphics/fvj4/raster' f=:{{% (*:x) + ^.y}}"0 2 f 1 0.25