Math Subject Class: 11F75

Abstract: Let K be a number field with euclidean ring of integers O. Let G be a finite-index torsion-free subgroup of Sp(2n, O). We exhibit a finite, geometrically defined spanning set of the top dimensional integral cohomology of G by generalizing the modular symbol algorithm of Ash and Rudolph.

BibTeX

@misc{math.NT/9809059,
    title = {Symplectic modular symbols},
    author = {Paul E. Gunnells},
    eprint = {math.NT/9809059}}