Barton Willis | 31 Jan 13:56 2015

limit( log(x)^2+2*%gamma*log(x)-%pi^2/6+%gamma^2, x, 1) --> und

I'll report this limit bug (expression %i70 was a term in an Euler-Maclaurin summation)

  

    (%i70) e : log(x)^2+2*%gamma*log(x)-%pi^2/6+%gamma^2$


Wrong:
    (%i71) limit(e,x,1);
    (%o71) und


OK:


    (%i72) tlimit(e,x,1);
    (%o72) -(%pi^2-6*%gamma^2)/6


Wrong:


    (%i108) limit(log(x)^2+2*%gamma*log(x)-%pi/3 + 42,x,1);
    (%o108) und


OK:


    (%i109) limit(log(x)^2+2*%gamma*log(x)-%pi + 42,x,1);
    (%o109) 42-%pi


--Barton
------------------------------------------------------------------------------
Dive into the World of Parallel Programming. The Go Parallel Website,
sponsored by Intel and developed in partnership with Slashdot Media, is your
hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/
_______________________________________________
Maxima-discuss mailing list
Maxima-discuss <at> lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/maxima-discuss
Dimiter Prodanov | 30 Jan 17:47 2015
Picon

Clifford algebra package

Hello everybody,

I got interested in Clifford algebra so I have written a short package.

You can find it here:


It was inspired by Viktor Toth's atensor package.

best regards,

Dimiter
------------------------------------------------------------------------------
Dive into the World of Parallel Programming. The Go Parallel Website,
sponsored by Intel and developed in partnership with Slashdot Media, is your
hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/
_______________________________________________
Maxima-discuss mailing list
Maxima-discuss <at> lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/maxima-discuss
Kai Velten | 30 Jan 16:07 2015
Picon

"Maxima in Tex" works on all platforms (Windows, Mac, ...)

In my post this afternoon I forgot to mention that the procedure works 
on all platforms (Windows, Mac, Linux ...), since everything is done in 
a virtual machine window.

Kind regards,
Kai Velten

--
Kai Velten
Hochschule Geisenheim University
Zentrum für Weinforschung und Verfahrenstechnologie der Getränke
AG Modellierung und Systemanalyse
von-Lade-Straße 1
D-65366 Geisenheim,
Germany
Tel. +49 6722.502.734, 0157.354.353.89
Fax 03222.3.943.753
kai.velten at hs-gm.de
modellierung.hs-geisenheim.de

------------------------------------------------------------------------------
Dive into the World of Parallel Programming. The Go Parallel Website,
sponsored by Intel and developed in partnership with Slashdot Media, is your
hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/
_______________________________________________
Maxima-discuss mailing list
Maxima-discuss <at> lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/maxima-discuss
Kai Velten | 30 Jan 14:52 2015
Picon

Maxima and R computations can be used in Tex documents

There is a simple procedure to use Maxima computations (as well as R 
computations) in Tex documents, see:

http://www.hs-geisenheim.de/fileadmin/user_upload/AG_Modellierung/Maxima-R-Tex-Example.pdf

I am using this e.g. in my university courses: I can demonstrate the 
procedures and at the same time create a well-formatted pdf document for 
the students.

Kind regards,

Kai

--
Kai Velten
Hochschule Geisenheim University
Zentrum für Weinforschung und Verfahrenstechnologie der Getränke
AG Modellierung und Systemanalyse
von-Lade-Straße 1
D-65366 Geisenheim,
Germany
Tel. +49 6722.502.734, 0157.354.353.89
Fax 03222.3.943.753
kai.velten at hs-gm.de
modellierung.hs-geisenheim.de

------------------------------------------------------------------------------
Dive into the World of Parallel Programming. The Go Parallel Website,
sponsored by Intel and developed in partnership with Slashdot Media, is your
hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/
_______________________________________________
Maxima-discuss mailing list
Maxima-discuss <at> lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/maxima-discuss
Raghu Char | 29 Jan 11:46 2015
Picon

matrix ops

Hi List,

I'd like to replace any row \col of a matrix, is there a function to do that?, the closest function i came across is "setelmx", in which case i'd have to write a loop, is there a better way?,  array subscripting like in matlab does not seem to work.

thanx in advance




--
regards 
raghu
------------------------------------------------------------------------------
Dive into the World of Parallel Programming. The Go Parallel Website,
sponsored by Intel and developed in partnership with Slashdot Media, is your
hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/
_______________________________________________
Maxima-discuss mailing list
Maxima-discuss <at> lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/maxima-discuss
Pankaj Sejwal | 28 Jan 14:36 2015
Picon

Re: Maxima-discuss Digest, Vol 12, Issue 48


On Tue, Jan 27, 2015 at 9:21 AM, <maxima-discuss-request <at> lists.sourceforge.net> wrote:
Message: 6
Date: Tue, 27 Jan 2015 18:17:43 +0100
From: Gunter K?nigsmann <gunter <at> peterpall.de>
Subject: Re: [Maxima-discuss] Maxima seems unable to solve simple
        linear  equation system
To: Olibuntu <olibuntu <at> posteo.de>,maxima-discuss <at> lists.sourceforge.net
Message-ID: <8aa6e930-53b1-4175-ac91-22f0b79b32ab <at> email.android.com>
Content-Type: text/plain; charset="utf-8"

I assume you only get a solution if you ask for n values for n equations: solving to [x,m,y,c] you will find a solution. In most cases this would be logical, anyway.
Alternatively you can replace the list by at( y=m*x+c, [m=-4/5, x=-2, y=1]) to reduce the formula to a single equation.

Kind regards,

   Gunter.


​If one does,
solve([m:-4/5, x:-2, y:1,y=m*x+c]);
then maxima says
"solve: more equations than unknowns.
Unknowns given : 
[c]
Equations given: 
[-4/5,-2,1,1=c+8/5]"

But looking closely, there is only one equation for one unknown. There is more to than meets the eye.​


--
Regards,
Pankaj Sejwal
____________________________________________________
"The more I read, the more I acquire, the more certain I am that I know nothing.” -
Voltaire
------------------------------------------------------------------------------
Dive into the World of Parallel Programming. The Go Parallel Website,
sponsored by Intel and developed in partnership with Slashdot Media, is your
hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/
_______________________________________________
Maxima-discuss mailing list
Maxima-discuss <at> lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/maxima-discuss
joaquin borges | 28 Jan 10:14 2015
Picon

tests error with maxima from git

Hello , I have  this message when I build Maxima from git
"Error summary:
Errors found in /home/daniel/fuentes/maxima-code/tests/rtest2.mac, problems:
(76 80 85 89 94 98)
6 tests failed out of 10,085 total tests."

My machine is ubuntu 14.04 64 bits with sbcl 1.27
The problem doesn't show when I run rtest2.mac
from   installed Maxima :
"Maxima branch_5_35_base_138_g0281764 http://maxima.sourceforge.net
using Lisp SBCL 1.2.7"

The problem is present today for example with :

"Maxima branch_5_35_base_163_g00c153f http://maxima.sourceforge.net
using Lisp SBCL 1.2.7"

which I didn't want to install just in case.
regards
joaquin


------------------------------------------------------------------------------
Dive into the World of Parallel Programming. The Go Parallel Website,
sponsored by Intel and developed in partnership with Slashdot Media, is your
hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/
_______________________________________________
Maxima-discuss mailing list
Maxima-discuss <at> lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/maxima-discuss
Olibuntu | 27 Jan 18:05 2015
Picon

Maxima seems unable to solve simple linear equation system

Hello!

When I enter
solve([y=m*x+c, m=-4/5, x=-2, y=1], c);
I get no solution:
[]

Whereas entering
solve(1=-4/5*(-2)+c, c);
yields
[c=-3/5]
as expected.

Am I doing something wrong, or does Maxima (wxMaxima 4.12.1)?

------------------------------------------------------------------------------
Dive into the World of Parallel Programming. The Go Parallel Website,
sponsored by Intel and developed in partnership with Slashdot Media, is your
hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/
Barton Willis | 27 Jan 15:24 2015

binary64/integer --> bigfloat

The big float surprised me somewhat:


    (%i135) 11.0/2^1076;
    (%o135) 1.358680526063428b-323


11/2^1076  is a subnormal binary64 (but 2^1076 overflows a binary64). The function float correctly converts 11/2^1076 to a binary64:


    (%i140) float(11/2^1076);
    (%o140) 9.88131291682493e-324


A default big float has a few more bits in its significand than does a binary64.


Yesterday, tested a few things from:


 http://dl.acm.org/citation.cfm?id=2493882&dl=ACM&coll=DL&CFID=475109818&CFTOKEN=30107374


--Barton
------------------------------------------------------------------------------
Dive into the World of Parallel Programming. The Go Parallel Website,
sponsored by Intel and developed in partnership with Slashdot Media, is your
hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/
_______________________________________________
Maxima-discuss mailing list
Maxima-discuss <at> lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/maxima-discuss
shinta dewi | 26 Jan 20:25 2015
Picon

venn diagram in maxima

hello....
How do I draw a Venn diagram in maxima, if the problem like this:


Given a set A = {a, b, c, d, e}, B = {a, c, e, g, i}], C = {c, f, i, e, o}
Define
:
intersection (A, B, C)
------------------------------------------------------------------------------
Dive into the World of Parallel Programming. The Go Parallel Website,
sponsored by Intel and developed in partnership with Slashdot Media, is your
hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/
_______________________________________________
Maxima-discuss mailing list
Maxima-discuss <at> lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/maxima-discuss
Henry Baker | 26 Jan 01:23 2015
Picon

Re: Question about 3d plots

I've been considering the possibility of dumping maxima 3D plots out in .stl format.

In addition to being able to display & rotate them as 3D images, one could also "print" them on a 3D printer
(binary .stl is a de facto standard for home 3D printers).

I've got some extremely rough Lisp code for reading/writing .stl files if anyone is interested.

At 07:41 PM 1/24/2015, Arya J wrote:
>Dear Friends
>How can i rotate a 3d plot in "maxima on android" by moving finger on the plot?
>thanks

------------------------------------------------------------------------------
Dive into the World of Parallel Programming. The Go Parallel Website,
sponsored by Intel and developed in partnership with Slashdot Media, is your
hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/

Gmane