#8555: Unexpected behaviour of symbolic zero.
-------------------------------------+-------------------------------------
       Reporter:  lfousse            |        Owner:  burcin
           Type:  defect             |       Status:  needs_work
       Priority:  major              |    Milestone:
      Component:  symbolics          |   Resolution:
       Keywords:                     |    Merged in:
        Authors:  André Apitzsch     |    Reviewers:
Report Upstream:  N/A                |  Work issues:
         Branch:                     |       Commit:
  u/aapitzsch/ticket/8555            |  c79c0fb678fb6e7f27a966ce7fbadfae258aa3c0
   Dependencies:                     |     Stopgaps:
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Changes (by vdelecroix):

 * status:  needs_review => needs_work


Comment:

 Hello,

 Peter: On the other hand, fast comparisons with `0` should be done within
 `__nonzero__` and called via `bool(P)` or possibly `P.is_zero()` that
 indirectly calls the former.

 André: Could you check that `__nonzero__` is implemented and modify the
 appropriate part of the code which uses `P == 0` or `P != 0`?

 Vincent

--
Ticket URL: <http://trac.sagemath.org/ticket/8555#comment:4>
Sage <http://www.sagemath.org>
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