#16721: symbolic gcd()
-----------------------------+------------------------
Reporter: rws | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.3
Component: symbolics | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps: todo
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Old description:
> Defect because of
> {{{
> sage: x=var('x')
> sage: gcd(x,4)
> 1
> }}}
> See also #15497
>
> Also an enhancement in order to be able to use `gcd()` in returned
> expression results.
New description:
Defect because of
{{{
sage: x=var('x')
sage: gcd(x,4)
1
sage: gcd(x,4,hold=True)
---------------------------------------------------------------------------
Traceback (most recent call last)
...
TypeError: gcd() takes no keyword arguments
}}}
See also #15497
--
Comment (by rws):
Replying to [comment:5 kcrisman]:
I agree that all examples you give are consistent *if the `gcd` is
considered not as a symbolic function. It may simply need an
implementation of `hold=True` to allow that usage. The only problem then
that I see is that people would have to learn the distinction between an
operation and a symbolic function, which they have to in many places
anyway.
So just make sure a big NOTE is given in the documentation.
--
Ticket URL: <http://trac.sagemath.org/ticket/16721#comment:7>
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