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Published online by Cambridge University Press: 09 April 2009
Let L denote a free Z-module of rank 2n and Φ an alternating bilinear mapping from L×L into the rational integers Z. Writing α · β for Φ(α, β), where α, β ∈ L, we have We shall assume that Φ is non-singular and unimodular (see Bourbaki [1]). L is now a (symplectic) lattice.