#19035: doctest syncing of elementary assumptions on symbols/functions with
Pynac
--------------------------------+-------------------------
Reporter: rws | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.10
Component: symbolics | Resolution:
Keywords: | Merged in:
Authors: Ralf Stephan | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: #19312 | Stopgaps:
--------------------------------+-------------------------
Changes (by rws):
* dependencies: pynac-0.4.4 => #19312
* branch:
u/rws/sync_elementary_assumptions_on_symbols_functions_with_pynac =>
* milestone: sage-6.9 => sage-6.10
* commit: ee70688802c8569df0eeac1f85188f4c22db2d0a =>
Old description:
> {{{
> sage: assume(x,'integer')
> sage: x.is_integer()
> False
>
> sage: assume(x>0)
> sage: x.is_positive()
> False
>
> sage: f=function('f')(x)
> sage: assume(f>0)
> sage: f.is_positive()
> False
> }}}
> Syncing with Pynac will allow limited but fast decision making (without
> Maxima) through already existing flag logic in Pynac.
>
> https://github.com/pynac/pynac/issues/81
>
> The branch of this ticket contains adaptions on the Sage side. The Pynac
> interface declarations are already committed (appearing in version
> 0.4.4+). The complete interface may be in Pynac-0.5.
New description:
With pynac-0.5 this will no longer give wrong results:
{{{
sage: assume(x,'integer')
sage: x.is_integer()
False
sage: assume(x>0)
sage: x.is_positive()
False
sage: f=function('f')(x)
sage: assume(f>0)
sage: f.is_positive()
False
}}}
Syncing with Pynac will allow limited but fast decision making (without
Maxima) through already existing flag logic in Pynac.
https://github.com/pynac/pynac/issues/81
The branch of this ticket contains adaptions on the Sage side. The Pynac
interface declarations are already committed (appearing in version
0.4.4+). The complete interface may be in Pynac-0.5.
--
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Ticket URL: <http://trac.sagemath.org/ticket/19035#comment:3>
Sage <http://www.sagemath.org>
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