[GiNaC-list] Multiplication of Boolean variables

[tklam]

Hi,

I am implementing an arithmetic system for only Boolean variables based on
GiNaC. May I know how I can
modify the behaviour of symbolic multiplication such that: x*x == x
(instead of x*x==x^2), and the multiplication of numeric remains unchanged
(eg 3*4 == 12) ?

Using subs(x^2 == x) works but I found it is slow if my expressions are
huge and there are many symbols.

Thank you very much.

Best regards,
argama
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