# Concept derivation guides

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Concept guide



## [Kernel, fibers and injectivity from C4 to C2](/en/derivations/derivation-mko-finite-group-homomorphism-kernel-01/?from=%2Fen%2Fderivations%2F%3Fq%3Dmko-finite-group-homomorphism-kernel)

For f:C4 to C2, f(a)=a mod 2, the normal kernel is {0,2}; fibers are its cosets and f is not injective.

Kernel of a finite group homomorphism

derivation-mko-finite-group-homomorphism-kernel-01





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