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How can I prove that u(15) is not isomorphic to u(25)?

2007-12-16 08:04:24 · 1 answers · asked by Hol 1 in Science & Mathematics ➔ Mathematics

1 answers

The groups aren't the same size.
U(15) is a group of order φ(15) = 8.
U(25) is a group of order φ(25) = 20.

2007-12-16 08:14:36 · answer #1 · answered by steiner1745 7 · 0⤊ 0⤋

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