Braids, mapping class groups, and categorical delooping
Dehn twists around simple closed curves in oriented surfaces satisfy the braid relations. This gives rise to a group theoretic map φ: β2g → τ g,1 from the braid group to the mapping class group. We prove here that this map is trivial in homology with any trivial coefficients in degrees less than g/2...
| Autors principals: | , |
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| Format: | Journal article |
| Idioma: | English |
| Publicat: |
2007
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