Hi:
I'm not sure if this is a bug but just in case, I'm reporting this behaviour:
Using SymPy in Sage (ie, type "from sympy import *"):
sage: x = Symbol('x')
sage: C1 = Symbol('C1')
sage: y = Function('y')
sage: soln = dsolve(Derivative(y(x),x)+sin(x)*y(x)^6,y(x)); soln
(C1 - 5*cos(x))**(-1/5)
sage: ypi = soln.subs(x,pi); ypi
(5 + C1)**(-1/5)
But now
sage: solve(ypi - 9, C1)
yields an error which I don't understand.
- David Joyner
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