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Sphere Packings, Lattices and Groups John Horton Conway, Neil J. A. Sloane
Publisher: Springer

The paper [2] contains a classification of the Eisenstein lattices for , , and . Download Sphere Packings, Lattices and Groups. Now one can see that a torus can be made into a group as follows: take the complex plane and set equal to zero all points which are linear integral combinations of two vectors with different directions, say 1 and i. More neat applications of theta functions. 290, Springer, New York, NY, USA, 3rd edition, 1999. Sphere Packings, Lattices and Groups. Sloane, Sphere Packings, Lattices and Groups, vol. C is a group and {n + mi, for all n,m, in Z} is a subgroup and you take the quotient group .. It looks at the 24 dimensional Leech lattice in numerous ways. Conway andSloane, Sphere Packings, Lattices and Groups, Springer, 1998. Eisenstein lattices (or the more general theta lattices introduced in [1]) are of interest in the theory of modular forms, as their theta series is a modular form of weight for the full Hermitian modular group with respect to (cf. One of the most information packed 600+ page tomes in the library here is Sphere Packings, Lattices and Groups by J. Sphere Packings, Lattices and Groups (Grundlehren der mathematischen Wissenschaften) book download Download Sphere Packings, Lattices and Groups (Grundlehren der mathematischen Wissenschaften) Conway,.