Comment #7 on issue 2011 by [email protected]: less self-confident
simplify
http://code.google.com/p/sympy/issues/detail?id=2011
"Alas, physics-related failure is not the only one"
Indeed.
I manifestly forgot to rerun all the tests after last changes...
In [6]: srepr([y**(1/b)*(1/a)**(1/b)])
Out[6]: [Mul(Pow(Symbol('y'), Pow(Symbol('b'), NegativeOne)),
Pow(Pow(Symbol('a'), NegativeOne), Pow(Symbol('b'), NegativeOne)))]
So, new result is clearly simpler than previous one, or did I miss
something ?
In that case, I'll simply change the test.
As for ode, new result is much simpler either :
In [7]: dsolve(eq15, f(x), hint='separable')
Out[7]:
2
x
C₁ - ──
2
f(x) = -1 + ℯ
while previous result was:
In [10]: Eq(f(x), (C1 - exp(x**2/2))*exp(-x**2/2))
Out[10]:
⎛ 2⎞ 2
⎜ x ⎟ -x
⎜ ──⎟ ───
⎜ 2 ⎟ 2
f(x) = ⎝C₁ - ℯ ⎠⋅ℯ
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