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  1. J

    Prove that if mn = 1 for integers, then m = n = 1 or m = n = -1

    Prove or disprove that if m and n are integers such that mn = 1 then either m= 1 & n = 1 or else m = -1 & n = -1.
  2. J

    Graduate If mn=1 for integers m and n, must m and n both equal ±1?

    Prove or disprove that if m and n are integers such that mn = 1 then either m= 1 & n = 1 or else m = -1 & n = -1.
    • johnjuwax
    • Thread
    • Analysis Proof Real analysis
    • Replies: 2
    • Forum: Calculus
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