#16007: give solution constants of ODEs unique names
------------------------+----------------------------
Reporter: rws | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.2
Component: calculus | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies: #8734
Stopgaps: |
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(this was reported as part of #6882)
... solving of ode y'=c*x is not correct, the free variable is messed up
with a parameter, see [http://groups.google.cz/group/sage-
devel/browse_thread/thread/e04cbc547095f2ac sage-devel] - thanks for
Yuri Karadzhov
{{{
sage: from sage.calculus.calculus import
symbolic_expression_from_maxima_string
sage: symbolic_expression_from_maxima_string('%c')
c
sage: c=var('c'); y=function('y',x); eq=diff(y,x)==c*x; eq
D[0](y)(x) == c*x
sage: desolve(eq,y,ivar=x)
1/2*c*x^2 + c
}}}
the answer should be something like 1/2*c*x^2^ + c1
The fix depends on closing #8734. The `c` variable that comes from Sage
can then be easily recognized, and the constant `c` should then be renamed
to `c1` or `_C1`.
--
Ticket URL: <http://trac.sagemath.org/ticket/16007>
Sage <http://www.sagemath.org>
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