#12257: doctest that only integer +/- 1 gets special treatment
-------------------------+-------------------------------------------------
Reporter: was | Owner: burcin
Type: | Status: needs_review
defect | Milestone: sage-6.8
Priority: minor | Resolution:
Component: | Merged in:
calculus | Reviewers:
Keywords: pynac | Work issues:
Authors: Ralf | Commit:
Stephan | 447ab202f1ed5ab34ec87c7f73d588acd5c9577a
Report Upstream: N/A | Stopgaps:
Branch: |
u/rws/12257 |
Dependencies: |
#18088, #18362 |
-------------------------+-------------------------------------------------
Old description:
> This is really bad
> {{{
> sage: 1.0 * pi
> pi
> sage: sin(1.0 * pi)
> 0
> }}}
> This is good:
> {{{
> sage: maxima('sin(%pi*1.0)')
> sin(1.0*%pi)
> sage: maxima('1.0*%pi')
> 1.0*%pi
> }}}
>
> This is likely the fault of ginac doing something stupid with 1.0 == 1.
>
> Ken Ribet pointed this out during the JMM 2012 meeting.
New description:
This is just a doctest of a fix already in main Sage.
Original description:
This is really bad
{{{
sage: 1.0 * pi
pi
sage: sin(1.0 * pi)
0
}}}
This is good:
{{{
sage: maxima('sin(%pi*1.0)')
sin(1.0*%pi)
sage: maxima('1.0*%pi')
1.0*%pi
}}}
This is likely the fault of ginac doing something stupid with 1.0 == 1.
Ken Ribet pointed this out during the JMM 2012 meeting.
--
Comment (by rws):
The `sin(1.0*pi)` issue is now #18697.
--
Ticket URL: <http://trac.sagemath.org/ticket/12257#comment:25>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/sage-trac.
For more options, visit https://groups.google.com/d/optout.
