#848 polynomial factoring fails

closed
nobody
Lisp Core (471)
5
2006-08-15
2005-12-28
Anonymous
No

factor(x^4-y^4)
factor(x^5+y^5)

Maxima 5.9.2 http://maxima.sourceforge.net
Using Lisp GNU Common Lisp (GCL) GCL 2.6.7 (aka GCL)
Distributed under the GNU Public License. See the file
COPYING.
Dedicated to the memory of William Schelter.
This is a development version of Maxima. The function
bug_report()
provides bug reporting information.
(%i1) factor(x^3-y^3);

Error in FACTOR [or a callee]:
Error in TYPE-ERROR-DATUM [or a callee]: The slot
CONDITIONS::DATUM is unbound in the object
#<CONDITIONS::INTERNAL-TYPE-ERROR.0>.

Please contct pwang@cs.kent.edu to obtain
the polymomial package "ppack" that can be included
in maxima for distribution.

Paul

Discussion

  • Barton Willis

    Barton Willis - 2005-12-30

    Logged In: YES
    user_id=895922

    I don't have this problem with 5.9.2.10cvs:

    (%i1) factor(x^3-y^3);
    (%o1) -(y-x)*(y^2+x*y+x^2)
    (%i2) factor(x^4-y^4);
    (%o2) -(y-x)*(y+x)*(y^2+x^2)
    (%i3) factor(x^5+y^5);
    (%o3) (y+x)*(y^4-x*y^3+x^2*y^2-x^3*y+x^4)
    (%i4) build_info();
    Maxima version: 5.9.2.10cvs
    Maxima build date: 12:57 12/20/2005
    host type: i686-pc-mingw32
    lisp-implementation-type: GNU Common Lisp (GCL)
    lisp-implementation-version: GCL 2.6.7
    (%o4)

    Barton

     
  • Barton Willis

    Barton Willis - 2005-12-30

    Logged In: YES
    user_id=895922

    I don't have this problem with 5.9.2.10cvs:

    (%i1) factor(x^3-y^3);
    (%o1) -(y-x)*(y^2+x*y+x^2)
    (%i2) factor(x^4-y^4);
    (%o2) -(y-x)*(y+x)*(y^2+x^2)
    (%i3) factor(x^5+y^5);
    (%o3) (y+x)*(y^4-x*y^3+x^2*y^2-x^3*y+x^4)
    (%i4) build_info();
    Maxima version: 5.9.2.10cvs
    Maxima build date: 12:57 12/20/2005
    host type: i686-pc-mingw32
    lisp-implementation-type: GNU Common Lisp (GCL)
    lisp-implementation-version: GCL 2.6.7
    (%o4)

    Barton

     
  • Robert Dodier

    Robert Dodier - 2006-08-15
    • status: open --> closed
     
  • Robert Dodier

    Robert Dodier - 2006-08-15

    Logged In: YES
    user_id=501686

    Not observed in 5.9.3.99rc1. Closing this report as "works
    for me".

     

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