Make issymmetric
unconditionally true for Number
s
#1435
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Following #1436 (comment), this PR changes
issymmetric
to always returntrue
forNumber
s, and analogouslyishermitian
for real numbers. This makes these methods type-based instead of value-based. The only exception at present was forNaN
and related numbers that didn't satisfyx == x
. This PR ignores such cases.