Comment #6 on issue 3479 by [email protected]: KroneckerDelta should
canonicalize
http://code.google.com/p/sympy/issues/detail?id=3479
My Bad, I didn't treat them as symbols. But then I also tried to test basic
trigonometric equalities and got something interesting --
x=Symbol("x")
y=Symbol("y")
KroneckerDelta(x,y) == KroneckerDelta(y,x)
False
tan(x)==(1/cot(x))
False
x=Rational(1,2)
y=Rational(1,2)
KroneckerDelta(x,y) == KroneckerDelta(y,x)
True
tan(x)==(1/cot(x))
False
x=Integer(2)
y=Integer(2)
KroneckerDelta(x,y) == KroneckerDelta(y,x)
True
tan(x)==(1/cot(x))
False
x=Float(2)
y=Float(2)
KroneckerDelta(x,y) == KroneckerDelta(y,x)
True
tan(x)==(1/cot(x))
True
I will start working on this when my midterm gets over on Monday.
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