We (1) characterize the Schubert varieties that arise as variations of Hodge structure (VHS); (2) show that the isotropy orbits of the infinitesimal Schubert VHS 'span' the space of all infinitesimal VHS; and (3) show that the cohomology classes dual to the Schubert VHS form a basis of the invariant characteristic cohomology associated with the infinitesimal period relation (a.k.a. Griffiths' transversality).
机构:
Hong Kong Univ Sci & Technol, Dept Math, Kowloon, Hong Kong, Peoples R ChinaHong Kong Univ Sci & Technol, Dept Math, Kowloon, Hong Kong, Peoples R China
He, Xuhua
Lam, Thomas
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Univ Michigan, Dept Math, Ann Arbor, MI 48109 USAHong Kong Univ Sci & Technol, Dept Math, Kowloon, Hong Kong, Peoples R China