There are four assumptions in Theorem 5.1(a):e * a = a for each a E Ga * e = a for each

Chapter 5, Problem 5.23

(choose chapter or problem)

There are four assumptions in Theorem 5.1(a):e * a = a for each a E Ga * e = a for each a E Gf * a = a for each a E Ga * f = a for each a E G.The proof of Theorem 5.I(a) uses only two of these assumptions. Which two? Which of thethree axioms for a group are used?

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