Status: Valid
Owner: ----
Labels: Type-Defect Priority-Critical
New issue 3518 by [email protected]: unrestrained_necklaces in iterables is
wrong
http://code.google.com/p/sympy/issues/detail?id=3518
http://mathworld.wolfram.com/Necklace.html gives a table of the number of
necklaces that should be obtained for different lengths and variety of
beads and the doctest for (3, 2) is giving only 2 outputs and it should be
3 (the 0,0,1 is missing). So it appears that this is broken. Even if we can
do filtering of normal permutations, that would be better than a wrong
routine.
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