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Improving _invert method in solveset #10971

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Shekharrajak commented Apr 5, 2016

Fixes #10864 and complex solution of #11096
Old solver have _tsolve to solve transcendental equation, but in solveset _invert method can handle some works of the _tsolve method.
One of them could be

x =symbols('x' , positive = True)
solveset(x**(y*z) - x,x,S.Reals)


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Shekharrajak commented Apr 5, 2016

I didn't understand
TypeError: Invalid comparison of complex -1 + I*pi
at line 390, in test_solveset_sqrt_2
same here

fixed now.

@@ -909,7 +909,7 @@ def test_improve_coverage():
x = Symbol('x')
y = exp(x+1/x**2)
solution = solveset(y**2+y, x, S.Reals)
unsolved_object = ConditionSet(x, Eq((exp((x**3 + 1)/x**2) + 1)*exp((x**3 + 1)/x**2), 0), S.Reals)
unsolved_object = ConditionSet(x, Eq(exp(x + x**(-2)) + exp(2*x + 2/x**2), 0), S.Reals)

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Shekharrajak Apr 8, 2016

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same thing is written in different way.

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