Geodesic
The extension of Johnson's homomorphism form the Torelli group to the mapping class group.
Inventiones mathematicae, Tome 111 (1993) no. 1, pp. 197-224 Cet article a éte moissonné depuis la source European Digital Mathematics Library

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Mots-clés : mapping class group of a Riemannian surface, action on the fundamental group, Torelli group, crossed homomorphism 
@article{IM_1993__111_1_144076,
     author = {Shigeyuki Morita},
     title = {The extension of {Johnson's} homomorphism form the {Torelli} group to the mapping class group.},
     journal = {Inventiones mathematicae},
     pages = {197--224},
     year = {1993},
     volume = {111},
     number = {1},
     zbl = {0787.57008},
     url = {http://geodesic.mathdoc.fr/item/IM_1993__111_1_144076/}
}
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Shigeyuki Morita. The extension of Johnson's homomorphism form the Torelli group to the mapping class group.. Inventiones mathematicae, Tome 111 (1993) no. 1, pp. 197-224. http://geodesic.mathdoc.fr/item/IM_1993__111_1_144076/