The Second Homology Group of the Mapping Class Group of an Orientable Surface.
Inventiones mathematicae, Tome 72 (1983), p. 221.

Voir la notice de l'article dans European Digital Mathematics Library

Classification : 20J05, 57N05, 14D20, 57R50, 30F20
Mots-clés : second homology group, mapping class group, orientable surface, maximal systems of isotopy classes of nonintersecting simple closed curves, bordism classes of fiber bundles, Picard group, moduli space, Francetta conjecture 
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     author = {John Harer},
     title = {The {Second} {Homology} {Group} of the {Mapping} {Class} {Group} of an {Orientable} {Surface.}},
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John Harer. The Second Homology Group of the Mapping Class Group of an Orientable Surface.. Inventiones mathematicae, Tome 72 (1983), p. 221. https://geodesic-test.mathdoc.fr/item/IM_1983__72_143018/