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Bug #1189

HilbertBasisKer: unhelpful error with some inputs

Added by John Abbott 27 days ago. Updated 21 days ago.

Status:
Feedback
Priority:
High
Category:
bug
Target version:
Start date:
19 Jun 2018
Due date:
% Done:

90%

Estimated time:
2.51 h
Spent time:

Description

HilbertBasisKer gives an unhelpful error sometimes:

M:=ColMat([-2,-5]]);
HilbertBasisKer(M);
--> ERROR: Cannot index an empty list
--> WHERE: at line 673 (column 23) of misc.cpkg5
-->   FromRing := owner(L[1]);
-->                       ^


Related issues

Related to CoCoA-5 - Design #1194: Rename HilbertBasisKer into LinKerHilbertBasis?New2018-06-25

History

#1 Updated by John Abbott 27 days ago

High priority because it's embarassing, but hopefully easy to fix.

#2 Updated by Anna Maria Bigatti 21 days ago

  • Assignee set to Anna Maria Bigatti
  • % Done changed from 0 to 80

Result is the empty list for such an input. Fixed.

#3 Updated by Anna Maria Bigatti 21 days ago

  • Related to Design #1194: Rename HilbertBasisKer into LinKerHilbertBasis? added

#4 Updated by Anna Maria Bigatti 21 days ago

  • Status changed from New to Feedback
  • % Done changed from 80 to 90
  • Estimated time set to 2.51 h

Checked in.

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