Status: New
Owner: ----
Labels: Type-Defect Priority-Medium
New issue 3994 by [email protected]: Error on diff equation
http://code.google.com/p/sympy/issues/detail?id=3994
http://www. wolframalpha. com/input/?i=%28y%27%29^2+%3D+x^3
On sympy:
dsolve(Derivative(y(x), x)**2 - x**3)
Traceback (most recent call last): File "<string>", line 1, in <module>
File "/base/data/home/apps/s~sympy-live-hrd/39.369438448182393855/sympy/sympy/solvers/ode.py",
line 473, in dsolve hint=hint, simplify=True, type='ode', **kwargs)
File "/base/data/home/apps/s~sympy-live-hrd/39.369438448182393855/sympy/sympy/solvers/deutils.py",
line 197, in _desolve hints = classifier(eq, func, dict=True, prep=prep)
File "/base/data/home/apps/s~sympy-live-hrd/39.369438448182393855/sympy/sympy/solvers/ode.py",
line 706, in classify_ode if r and r[c1]: KeyError: c1_
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