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Bug #186

LCM(0,x)

Added by John Abbott almost 12 years ago. Updated almost 12 years ago.

Status:
Closed
Priority:
Normal
Assignee:
John Abbott
Category:
Incomplete function
Target version:
CoCoA-5.0.3
Start date:
13 Jun 2012
Due date:
% Done:

100%

Estimated time:
2.00 h
Spent time:
3.50 h

Description

Use QQ[x];
LCM(0,x);  --> type error :-(
LCM(x-x,x); --> WRONG ANSWER!!!

Bug reported by Giulia Bianco.
Fix, and update tests.
Might be a CoCoALib bug.

History

#1 Updated by John Abbott almost 12 years ago

  • % Done changed from 0 to 70

Fixed the wrong result -- it was a bug in CoCoALib.
Fixed the type error (in Builtin.C) but fix is rather ugly.

Must update tests, and maybe doc.

Note gcd/lcm with a RAT will still give a type error; this is as we want!

#2 Updated by John Abbott almost 12 years ago

  • Status changed from New to Closed
  • % Done changed from 70 to 100

Added new test test-RingElem1 which currently just does some simple sanity checks on gcd and lcm.

Cleaned up the doc for gcd/lcm.

Closing the issue despite the ugliness of the modification to Builtin.C.

#3 Updated by Anna Maria Bigatti almost 12 years ago

  • Category set to Incomplete function
  • Assignee set to John Abbott
  • Target version set to CoCoA-5.0.3

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