bugAxiom Computer Algebra System - Bugs: bug #10312, Problems raising a UTS to a...

 
 

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bug #10312: Problems raising a UTS to a negative integer power

Submitted by:  Martin Rubey <kratt6>
Submitted on:  Tue 07 Sep 2004 02:28:57 PM UTC  
 
Category:  algebra Severity:  3 - Normal
Item Group:  code bug Status:  Fixed
Privacy:  Public Assigned to:  None
Originator Name:  Open/Closed:  Closed
Release:  Reproducibility:  None
Fixed Release:  November 2008
Error message: 

 >> Error detected within library code:
   ** rational power of coefficient undefined

protected-symbol-warn called with (NIL)

Example of code trigerring the bug: 

p:=(1/2+n)::UTS(FRAC INT, 'n, 0)
(p**(-1))$UTS(FRAC INT, 'n, 0)

Internal cause: 

Wed 08 Sep 2004 09:09:58 AM UTC, comment #1: 

resolved in patch #3349

Martin Rubey <kratt6>
Tue 07 Sep 2004 02:28:57 PM UTC, original submission:  

The code below raises an unnecessary error. The problem
is in sttaylor.spad/powern, where no distinction between rational and integer powers are made.

The fix is easy. In fact, I just realize that the problem does not exist in SUPS, so we can just take the definition there. I'll submit a patch tomorrow.

Martin Rubey <kratt6>

 

No files currently attached

 

Depends on the following items: None found

Items that depend on this one: None found

 

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    Follow 8 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2008-11-25 axiom Statustransferred => Fixed
        Open/ClosedOpen => Closed
        Fixed Release => November 2008
    2008-11-25 axiom Assigned tobillpage1 => None
    2005-01-22 billpage1 StatusNone => transferred
    2004-12-28 billpage1 Assigned toNone => billpage1
        Error message >> Error detected within library code: ** rational power of coefficient undefined protected-symbol-warn called with (NIL) => >> Error detected within library code: ** rational power of coefficient undefined protected-symbol-warn called with (NIL)
        Example of code trigerring the bugp:=(1/2+n)::UTS(FRAC INT, 'n, 0) (p**(-1))$UTS(FRAC INT, 'n, 0) => p:=(1/2+n)::UTS(FRAC INT, 'n, 0) (p**(-1))$UTS(FRAC INT, 'n, 0)

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