Consequences of Cauchy’s Theorem
نویسنده
چکیده
Theorem 1.2. If all non-identity elements of G have the same order, this order is a prime p and |G| is a power of p. Proof. If |G| has two prime factors, say p and q, then G contains elements of orders p and q by Cauchy, which contradicts the hypothesis. Thus |G| has only one prime factor, say |G| = pm for a prime p. The orders of a non-identity element could be {p, p2, . . . , pm}. However, by Cauchy some g ∈ G has order p, so the hypothesis tells us every non-identity element of G has order p.
منابع مشابه
Complex Analysis
I. The Complex Number System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 II. Elementary Properties and Examples of Analytic Fns. . . . . . . . . . . . . . . . 3 Differentiability and analyticity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 The Logarithm . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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