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Ultrametric theta functions and abelian varieties

Published online by Cambridge University Press:  22 January 2016

Horacio Tapia-Recillas*
Affiliation:
Departamento de Matemáticas Centro de Investigación, I.P.N. México, D.F. México
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Let k be a field complete with respect to a non-trivial, non-archimedean valuation and let g be a positive integer. Consider the following question : if Γ is a multiplicative subgroup of Gg = (k*)g satisfying certain “Riemann conditions”, can one construct in a natural way an abelian variety defined over k having Gg/Γ as its set of k-rational points? This problem was first considered by Morikawa [3]. J. Tate provided a complete solution for g = 1 (cf. for example [6]). J. McCabe [2] gave a partial solution for g > 1. He showed how to attach to Γ a graded ring R of theta functions such that A = Proj. R is g-dimensional abelian variety over k.

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Type
Research Article
Copyright
Copyright © Editorial Board of Nagoya Mathematical Journal 1978