The index of a subgroup of the symplectic modular group.
Spence, Edward
Michigan Math. J., Tome 19 (1972) no. 1, p. 57-64 / Harvested from Project Euclid
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Publié le : 1972-03-14
Classification:  20H05,  15A36 
@article{1029000798,
     author = {Spence, Edward},
     title = {The index of a subgroup of the symplectic modular group.},
     journal = {Michigan Math. J.},
     volume = {19},
     number = {1},
     year = {1972},
     pages = { 57-64},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1029000798}
}

Spence, Edward. The index of a subgroup of the symplectic modular group.. Michigan Math. J., Tome 19 (1972) no. 1, pp.  57-64. http://gdmltest.u-ga.fr/item/1029000798/