Updates:
Status: Invalid
Comment #1 on issue 3593 by [email protected]: order of args shouldn't
matter in Piecewise
http://code.google.com/p/sympy/issues/detail?id=3593
Of course the order matters, in pseudocode the Piecewise is:
if x < 1 is True:
return x
elif True is True:
return y*(1 + y/x)
while the Piecewise with reversed args is
if True is True:
return y*(1 + y/x)
elif x < 1:
return x
thus with reversed args you never reach the elif condition.
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