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Lecture Notes on Bayesian Estimation and Classification Mário A T Figueiredo

《Lecture Notes on Bayesian Estimation and Classification》 · 第 18 页 · Section 1.4「Homomorphisms and Quotient Groups」

Of the greatest importance are the image $\operatorname{Im}\alpha$ and the kernel $\operatorname{Ker}\alpha$ of a homomorphism $\alpha:G\to H$. These subsets are defined as follows: $\operatorname{Im}\alpha=\{x^\alpha\mid x\in G\}$ and $\operatorname{Ker}\alpha=\{x\mid x\in G,\ x^\alpha=1_H\}$.

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