We have defined the product of two sets of strings in general. If we apply this to the case where both inters are the same set. S = T, we obtain squares. S2 Similarly, we can define S3, S4, .... Show that it makes some sense to write.

a) S* = Λ + S+ Si + S2 + S3 + ...

b) S + = S + St + S2 + S3 + S4 + ...

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For two identical sets S T product of them is equal to S 2 for three of them S 3 and so on Now we ha... View the full answer