#270 taylor of taylor => fatal error

closed
nobody
5
2006-04-09
2003-03-24
No

taylor(taylor(a*b,a,0,1),b,1/a,1) => fatal error

Maxima 5.9.0 GCL 2.5.0 Windows 2000 mingw

Discussion

  • Stavros Macrakis

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    Simpler example:

    taylor(taylor(a*b,a,0,1),b,a,1)

    Note that taylor(a*b,a,0,1,b,a,1) sensibly gives a user-
    oriented error:

    TAYLOR: attempt to expand a b at a point depending on b --
    an error.

     
  • Robert Dodier

    Robert Dodier - 2005-04-11

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    user_id=501686

    I've tried this with Maxima cvs rev 2005/04/09 on gcl 2.6.6,
    fedora linux. I get the "attempt to expand" for all three
    examples given here --

    taylor(taylor(a*b,a,0,1),b,1/a,1) => "attempt to expand ..."
    taylor(taylor(a*b,a,0,1),b,a,1) => "attempt to expand ..."
    taylor(a*b,a,0,1,b,a,1) => "attempt to expand ..."

    Looking at the log for src/hayat.lisp, there have been some
    code changes over the years (sloop replacement and cleanups
    contributed by Andreas Eder). Maybe this bug can be
    re-tested on Windows.

     
  • Robert Dodier

    Robert Dodier - 2005-04-11
    • labels: --> 460522
    • summary: taylor of taylor => fatal error --> taylor of taylor => fatal error
     
  • Robert Dodier

    Robert Dodier - 2006-04-09
    • labels: 460522 --> Lisp Core - Taylor
     
  • Stavros Macrakis

    • status: open --> closed
     
  • Stavros Macrakis

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    user_id=588346

    OK on

    Maxima version: 5.9.3
    Maxima build date: 0:52 3/20/2006
    host type: i686-pc-mingw32
    lisp-implementation-type: GNU Common Lisp (GCL)
    lisp-implementation-version: GCL 2.6.7

    Closing bug

     

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