Let A be the alphabet {a, a-,b,b-}. Show that the subset E of all reduced words...
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Let A be the alphabet {a, a-,b,b-}. Show that the subset E of all reduced words of even length forms a subgroup of the free group F(a, b). Find a folded {a, b}-graph whose language at some vertex is E. Let A be the alphabet {a, a-,b,b-}. Show that the subset E of all reduced words of even length forms a subgroup of the free group F(a, b). Find a folded {a, b}-graph whose language at some vertex is E.
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