Let R be a ring with unity, 1. Let S be a ring and suppose phi: R --> S is an epimorphism. Prove that phi(1) is a unity for S.

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- October 13th 2009, 11:04 AMCoda202Epimorphism
Let R be a ring with unity, 1. Let S be a ring and suppose phi: R --> S is an epimorphism. Prove that phi(1) is a unity for S.

- October 13th 2009, 02:49 PMtonio