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Theta functions and modular jets

Published online by Cambridge University Press:  22 January 2016

H. D. Fegan
H. D. Fegan*
Affiliation:
Rice University
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Let ⌈ be a subgroup of the modular group PSL(2,Z) then ⌈ acts on the upper half plane H = {zЄC : Im z > 0} and we can form the Riemann surface M = H/⌈, see [3]. The complex line bundles on a Riemann surface M form a group H1(M, *), see [4], and whenever we raise a line bundle to a power it will be in this group. Let κ denote the canonical bundle on M then a modular form of weight ν is a section of the bundle . A modular n-jet is then a section of Jn the n-th jet bundle, see [7]. We can reformulate these ideas in the following terms. A modular form can be viewed as a function Φ: H → C and a modular n-jet as a vector valued function Φ: H → Cn+1 both of which satisfy a transformation law under the elements of Γ.

Type
Research Article
Information
Nagoya Mathematical Journal , Volume 72 , December 1978 , pp. 83 - 92
Copyright
Copyright © Editorial Board of Nagoya Mathematical Journal 1978

References

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