Suppose that E is an alphabet, and that f :E* → E* has the property that f(ơ) = o for every o e E an f(xy) = f(x) f(y) for every x, y € £*. Prove that for every x € E*, f (x) = x.

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Suppose that E is an alphabet, and that f :E* - E* has the property that f(ơ) = o for every o e £ and
f(xy) = f(x)f(y) for every x, y e £*. Prove that for every x e E*, f(x) = x.
Transcribed Image Text:Suppose that E is an alphabet, and that f :E* - E* has the property that f(ơ) = o for every o e £ and f(xy) = f(x)f(y) for every x, y e £*. Prove that for every x e E*, f(x) = x.
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