Sorry about the second issue on my first mail. I have corrected my
explanation in the followup email.
On Friday, June 22, 2012 3:34:15 PM UTC-5, Stefan Krastanov wrote:
>
> By the way, on my machine only the hashes get equal for commutative
> symbols, not the ids:
>
> In [12]: hash(A*B*C) == hash(C*A*B)
> Out[12]: False
>
> In [13]: id(A*B*C) == id(C*A*B)
> Out[13]: False
>
> In [14]: A,B,C = symbols('A B C', commutative=True)
>
> In [15]: hash(A*B*C) == hash(C*A*B)
> Out[15]: True
>
> In [16]: id(A*B*C) == id(C*A*B)
> Out[16]: False
>
> So A*B*C and C*A*B generate different Mul instances even for
> commutative symbols.
>
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