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Hodge vector bundle : ウィキペディア英語版
Hodge bundle
In mathematics, the Hodge bundle, named after W. V. D. Hodge, appears in the study of families of curves, where it provides an invariant in the moduli theory of algebraic curves. Furthermore, it has applications to the theory of modular forms on reductive algebraic groups and string theory.
==Definitions==
Let \mathcal_g be the moduli space of algebraic curves of genus ''g'' curves over some scheme. The Hodge bundle Λ''g'' is a vector bundle on \mathcal_g whose fiber at a point ''C'' in \mathcal_g is the space of holomorphic differentials on the curve ''C''. To define the Hodge bundle, let \pi:\mathcal_g\rightarrow\mathcal_g be the universal algebraic curve of genus ''g'' and let ω''g'' be its relative dualizing sheaf. The Hodge bundle is the pushforward of this sheaf, i.e.
:\Lambda_g=\pi_
*\omega_g.\,

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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