On Friday, 15 January 2016 17:04:20 UTC+1, Alexander Lindsay wrote:
>
>
> and carry them around in expressions that way because I want to *avoid*
> simplifications like (C is another vector): A * B / (A * C) = B / C
>
>
This is a trick: declare *A, B, C* as non commutative variables:
In [1]: A, B, C = symbols('A B C', commutative=False)
In [2]: A * B / (A * C)
Out[2]:
-1
A*B*(A*C)
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