Abstract Algebra | Homomorphisms and the order of an element.

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We prove a useful result regarding the order of an element versus the order of its image.

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Correction phi(1)= 0
This map is missing

depressedguy
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our professor made a mistake in the last example : the identities in Z24 and Z18 are both zero.

geekmath-uxzj
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Rank nullity theorem!
Independence is dual to dependence.

hyperduality