Status: Accepted
Owner: ----
Labels: Type-Defect Priority-Medium Quantum EasyToFix
New issue 3172 by ronan.l...@gmail.com: KroneckerDelta contains
secondquant-specific stuff
http://code.google.com/p/sympy/issues/detail?id=3172
I think it would be better if sympy.functions didn't have any
secondquant-specific code. So, secondquant should subclass KroneckerDelta
(maybe it's OK to give the subclass the same name?) and all the secondquant
methods like is_above_fermi, _get_preferred_index, etc. should be moved
there.
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