Embedding mapping-class groups of orientable surfaces with one boundary component

Details Embedding mapping-class groups of orientable surfaces with one boundary component Embedding mapping-class groups of orientable surfaces with one boundary component

2010-06-11

arxiv.org/abs/1006.2297v1

Mathematics

Group Theory

Scientific paper

Let $S_{g,1,p}$ be an orientable surface of genus $g$ with one boundary component and $p$ punctures. Let $\mathcal{M}_{g,1,p}$ be the mapping-class group of $S_{g,1,p}$ relative to the boundary. We construct homomorphisms $\mathcal{M}_{g,1,p} \to \mathcal{M}_{g',1,(b-1)}$, where $g' \geq 0$ and $b\geq 1$. We proof that the constructed homomorphisms $\M_{g,1,p} \to \M_{g',1,(b-1)}$ are injective. One of these embeddings for $g = 0$ is classic.

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