id summary reporter owner description type status priority milestone component resolution keywords cc merged author reviewer upstream work_issues branch commit dependencies stopgaps
16007 give solution constants of ODEs unique names rws "(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`." defect closed major sage-6.3 calculus fixed kcrisman Ralf Stephan Nils Bruin, Karl-Dieter Crisman N/A a8df107e76527d83a87456520395ab85dbc44050 #8734