Comment #7 on issue 2265 by [email protected]: cse requires subexpressions
to be in the exact same order
http://code.google.com/p/sympy/issues/detail?id=2265
OK, making that change gives
h[1] >>> cse([a+c, a+b+c])
([(x0, a + c)], [x0, b + x0])
But we're not going to check all permutations, right? So the following does
not recognize that a + c is repeated:
h[2] >>> cse([a + c + e, a + c + b])
([], [a + c + e, a + b + c])
(I repushed the branch.)
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