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Problem with separable differential equation #22862

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nickme68 opened this issue Jan 14, 2022 · 1 comment
Open

Problem with separable differential equation #22862

nickme68 opened this issue Jan 14, 2022 · 1 comment

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@nickme68
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SymPy can't solve without hints simple separable DE y ** 2 * y' = sqrt(y)

x = symbols("x")
y = Function("y")(x)
y_ = Derivative(y, x)
ode = Eq(y ** 2 * y_, sqrt(y))
dsolve(ode, y)

But it can be solved successfully with hint="separable" or using option simplify=False.
For this equation classify_ode returns following hints:

('factorable',
 'separable',
 '1st_exact',
 'Bernoulli',
 '1st_power_series',
 'lie_group',
 'separable_Integral',
 '1st_exact_Integral',
 'Bernoulli_Integral')

Problem with factorable hint?

skirpichev added a commit to skirpichev/diofant that referenced this issue Jan 16, 2022
@faze-geek
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Ping @oscarbenjamin .
I am working on this .What would be a good approach to deal with this issue !

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