Can someone please help me with this question? thanks
A binary operation * is defined on Z by m*n = m + n -2
Prove that Z with operation * is a monoidRe:To prove that Z becomes a monoid you have to establish three things:
The operation * is defined for any two numbers m and n from Z.
The operation * is associative.
The operation * has a unit e such that for any m in Z m*e = e*m = m.
Exactly which if the three do you find difficult to prove?
i know the monoid properties but how do i relate it with m*n = m + n -2???? i really blur about this....
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