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: algebraSeverity: 3 - Normal
Item Group: code bugStatus: Fixed
Privacy: PublicAssigned 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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  • -unavailable- added by axiom (Updated the item)
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    Follow 8 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Tue 25 Nov 2008 04:09:56 AM UTCaxiomStatustransferred=>Fixed
      Open/ClosedOpen=>Closed
      Fixed Release=>November 2008
    Tue 25 Nov 2008 04:09:17 AM UTCaxiomAssigned tobillpage1=>None
    Sat 22 Jan 2005 05:51:54 AM UTCbillpage1StatusNone=>transferred
    Tue 28 Dec 2004 03:51:57 PM UTCbillpage1Assigned 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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