#15775: doctest: desolve bug
-------------------------------+--------------------------
Reporter: eviatarbach | Owner:
Type: defect | Status: needs_work
Priority: major | Milestone: sage-6.5
Component: symbolics | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
-------------------------------+--------------------------
Changes (by rws):
* status: needs_review => needs_work
* milestone: sage-duplicate/invalid/wontfix => sage-6.5
Old description:
> I encountered this bug:
>
> {{{
> sage: y = function('y', x)
> sage: desolve(diff(y, x) == sqrt(abs(y)), dvar=y, ivar=x)
> c + x
> }}}
>
> This is wrong. Maxima's `ode2` just leaves it as
> `'integrate(1/sqrt(abs(y)),y) = x+%c`, so there's probably a bug involved
> in converting to and from Maxima.
New description:
This is fixed but needs a doctest:
I encountered this bug:
{{{
sage: y = function('y', x)
sage: desolve(diff(y, x) == sqrt(abs(y)), dvar=y, ivar=x)
c + x
}}}
This is wrong. Maxima's `ode2` just leaves it as
`'integrate(1/sqrt(abs(y)),y) = x+%c`, so there's probably a bug involved
in converting to and from Maxima.
--
--
Ticket URL: <http://trac.sagemath.org/ticket/15775#comment:5>
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.
