# Differences

This shows you the differences between two versions of the page.

semigroups [2018/05/06 00:52]
jipsen
semigroups [2018/05/06 00:54] (current)
jipsen
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==Morphisms== ==Morphisms==
Let $\mathbf{S}$ and $\mathbf{T}$ be semigroups. A morphism from $\mathbf{S}$ Let $\mathbf{S}$ and $\mathbf{T}$ be semigroups. A morphism from $\mathbf{S}$
-to $\mathbf{T}$ is a function $h:Sarrow T$ that is a homomorphism: +to $\mathbf{T}$ is a function $h:S\to T$ that is a homomorphism:
$h(xy)=h(x)h(y)$ $h(xy)=h(x)h(y)$
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\end{array}$\end{array}$
-[[Search for finite semigroups]]
[http://oeis.org/A027851 Semigroups in the Encyclopedia of Integer Sequences] [http://oeis.org/A027851 Semigroups in the Encyclopedia of Integer Sequences]