file maxima/share/sym/resolv1.lsp
Good morning dear collegues,
I'm the author of the package "symmetries" of maxima (in maxima/share/sym/)
(%i49) resolvante: lineaire$
(%i50) resolvante(x^3-6,x,x1+2*x2+3*x3,[x1,x2,x3]);
" resolvante lineaire "
Maxima encountered a Lisp error:
EVAL: undefined function TIMES
Automatically continuing.
To reenable the Lisp debugger set *debugger-hook* to nil.
================
the function resolvante apply a function of the file maxima/share/sym/resolv1.lsp (joined) when the variable "resolvante" is affected to " lineaire").
The function " times" (not TIMES) appears two times in file maxima/share/sym/resolv1.lsp
With the preceding versions of maxima this problem does not exists. The function resolvante (with lineaire) was ok.
I use maxima under Sage
See bellow "bug_report()" informations :
========
(%i7) bug_report();
...
-------------------------------------------------------------
Maxima version: 5.13.0
Maxima build date: 15:23 7/11/2008
host type: i686-apple-darwin9.2.0
lisp-implementation-type: CLISP
lisp-implementation-version: 2.46 (2008-07-02) (built on bsd.local [10.95.224.68])
-------------------------------------------------------------
What do you think about ?
I work about a conference on Evariste Galois (National Celebration ...) ,
I need to make some computations, as the (linear) Galois resolvent, and I have'nt many time.
Thank to help me.
Sincerly yours, Annick Valibouze
file maxima/share/sym/resolv1.lsp
I have observed this bug in even older version Maxima 5.9, too.
Maxima does not know a function or macro with the name times. I had a look at the code and I have tried to insert the function mul at two places. With this change I get a result:
(%i4) resolvante: lineaire$
(%i5) resolvante(x^3-6,x,x1+2*x2+3*x3,[x1,x2,x3]);
" resolvante lineaire "
6
5
4
3
2
1
(%o5) y^6+972
I do not know if the result is correct and I do not know the algorithm. But if the functions times is supposed to multiply the arguments, than mul is the correct replacement in the file reslov1.lisp.
By the way: When loading the functions of the package I get a lot of compiler warnings. There might be more problems.
Dieter Kaiser
In addition, this is a summary of the compiler report, when loading the package with SBCL and the actual Maxima version 5.25post:
; compilation unit finished
; Undefined functions:
; $ADD_SYM $DIVI_SYM $EV $EXP_SYM $FADD_SYM $FMULT_SYM $MULT_SYM $PART0 GROUPE_RESOLVANTE PUI2POLYNOME_GENERIQUE TIMES
; Undefined variables:
; $DIRECTNEW $RESOLCAYLEY $RESOLVANTE $SCHUR2COMP AAAAA LL1
; caught 6 WARNING conditions
; caught 26 STYLE-WARNING conditions
Dieter Kaiser
Thanks for your answers
Your result is ok.
you can test with (the default) :
resolvante: general$
resolvante(x^3-6,x,x1+2*x2+3*x3,[x1,x2,x3]);
Compilation :
For the variables, I think that it is not a problem
(I must take time to return in code to test all)
For the functions, at this moment, I have not answer.
It is clear, that with old versions of Maxima the function times was ok and compilation presented any problem ; others functions seems to be sym functions.
I have some problem to compile too.
When my conference will be finish, I will take time to anderstand what it appends and to debug and propose the new version
(with some new functions about resolvents ...)
Annick Valibouze
Remark :
The algorithm with
resolvante : lineaire$
is not the same than the algorithm with
resolvante: general$
which does not depend on the invariant;
The first is more rapid because the power functions of the roots of the resolvent are computed specificaly from a formulae providing to the multinomial formulae.
Fixed by commit 8965c6305: change TIMES to M*. Closing this report.
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