Mapping class group and the Casson invariant
[Groupe d'homéotopie de surfaces et invariant de Casson]
Perron, Bernard
Annales de l'Institut Fourier, Tome 54 (2004), p. 1107-1138 / Harvested from Numdam
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En utilisant une nouvelle définition des second et troisième homomorphismes de Johnson, on simplifie et on généralise les résultats de Morita sur l'invariant de Casson des sphères d'homologie définies par scindement de Heegard. En particulier, on calcule l'invariant de Casson des sphères d'homologie obtenues en recollant deux corps d'anses par un homéomorphisme du groupe de Torelli.

Using a new definition of the second and third Johsnon homomorphisms, we simplify and extend the work of Morita on the Casson invariant of homology-spheres defined by Heegard splittings. In particular, we calculate the Casson invariant of the homology-sphere obtained by gluing two handlebodies along a homeomorphism of the boundary belonging to the Torelli subgroup.

Publié le : 2004-01-01
DOI : https://doi.org/10.5802/aif.2045
Classification:  57M05
Mots clés: groupe d'homéotopie, homomorphismes de Johnson-Morita, sphères d'homologie, invariant de Casson 
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     title = {Mapping class group and the Casson invariant},
     journal = {Annales de l'Institut Fourier},
     volume = {54},
     year = {2004},
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     doi = {10.5802/aif.2045},
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Perron, Bernard. Mapping class group and the Casson invariant. Annales de l'Institut Fourier, Tome 54 (2004) pp. 1107-1138. doi : 10.5802/aif.2045. http://gdmltest.u-ga.fr/item/AIF_2004__54_4_1107_0/

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