Opened 3 years ago

Closed 3 years ago

#19775 closed defect (duplicate)

normalization in Pynac buggy

Reported by: rws Owned by:
Priority: minor Milestone: sage-7.3
Component: symbolics Keywords:
Cc: Merged in:
Authors: Ralf Stephan Reviewers: Paul Masson
Report Upstream: Fixed upstream, in a later stable release. Work issues:
Branch: Commit:
Dependencies: #21034 Stopgaps:

Description (last modified by rws)

from https://groups.google.com/forum/?hl=en#!topic/sage-devel/awa0lNGJugo Minimal version:

sage: a,b,c,d,e=var('a,b,c,d,e')
sage: (c/a - b*c^2/(a^2*(b*c/a-d)) + c*d/(a*(b*c/a-d))).normalize()
0
sage: (e + c/a - b*c^2/(a^2*(b*c/a-d)) + c*d/(a*(b*c/a-d))).normalize()
(a^2*b*c*e - a^3*d*e)/((b*c - a*d)*a^2)

This changed somewhere between 6.6 (output e) and 7.0.

See https://github.com/pynac/pynac/issues/111

Change History (7)

comment:1 Changed 3 years ago by rws

  • Description modified (diff)
  • Report Upstream changed from N/A to Reported upstream. Developers acknowledge bug.

comment:2 Changed 3 years ago by rws

  • Description modified (diff)

comment:3 Changed 3 years ago by rws

  • Description modified (diff)
  • Priority changed from major to minor

comment:4 Changed 3 years ago by rws

  • Report Upstream changed from Reported upstream. Developers acknowledge bug. to Fixed upstream, in a later stable release.

Fixed in pynac-0.6.8.

comment:5 Changed 3 years ago by paulmasson

  • Dependencies set to #21034
  • Milestone changed from sage-7.0 to sage-7.3
  • Reviewers set to Paul Masson
  • Status changed from new to needs_review

comment:6 Changed 3 years ago by paulmasson

  • Authors set to Ralf Stephan
  • Status changed from needs_review to positive_review

Fixed in #21034

comment:7 Changed 3 years ago by vbraun

  • Resolution set to duplicate
  • Status changed from positive_review to closed
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