Updates:
Status: Started
Owner: [email protected]
Comment #11 on issue 281 by [email protected]: Infinity is a subclass of
Rational
http://code.google.com/p/sympy/issues/detail?id=281
https://github.com/mattpap/sympy/tree/infinities branch changes the base of
NaN, Infinity and NegativeInfinity from Rational to Number. This is a
nontrivial change, because usage of p and q of nan, oo and -oo was
hardwired in several places. I would prefer to change the base to
AtomicExpr (the same as for zoo), but this would require a major rewrite of
numbers.py and maybe others. All tests pass but one. The test failure is in
pickling (test_core_basic: SingletonRegistry and SingletonRegistry()). It's
peculiar, because this happens when I run bin/test, but not bin/test
sympy/utilities.
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