Summary
The variation of Hodge structure defined by the natural family of hypersurfaces of degreed and dimensionn is maximal if the cohomology has Hodge level >1. There is a small list of hypersurfaces of “level one” which give non-maximal variations: plane curves of degreed≧5, cubics of dimension 3 and 5, and quartic threefolds.
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Research partially supported by the National Science Foundation
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Carlson, J.A., Donagi, R. Hypersurface variations are maximal, I. Invent Math 89, 371–374 (1987). https://doi.org/10.1007/BF01389084
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DOI: https://doi.org/10.1007/BF01389084