Updates:
Labels: -Evalf Solvers WrongResult
Comment #1 on issue 3243 by [email protected]: evalf doesn't do it
http://code.google.com/p/sympy/issues/detail?id=3243
Ah, now that I look at the printed result, I see what the issue is. The
_75224 is the issue. For some reason there are Dummys in the expression:
In [281]: [i.atoms(Symbol) for i in solve(f.subs(alpha, -0.139), lamda)]
Out[281]: [set(75371, 75377, 75386), set(75392, 75398, 75415), set(75429,
75435, 75444), set(75450, 75456, 75473)]
Pretty printing Dummys with automatic names without the _ is probably a bad
idea.
So this is a bug in solve(), not evalf.
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