We consider projective varieties with degenerate Gauss imagewhose focal hypersurfaces are non-reduced schemes. Examplesof this situation are provided by the secant varieties ofSeveri and Scorza varieties. The Severi varieties are moreovercharacterized by a uniqueness property.
Some remarks on projective varieties with degenerate Gauss image
MEZZETTI, EMILIA;
2004-01-01
Abstract
We consider projective varieties with degenerate Gauss imagewhose focal hypersurfaces are non-reduced schemes. Examplesof this situation are provided by the secant varieties ofSeveri and Scorza varieties. The Severi varieties are moreovercharacterized by a uniqueness property.File in questo prodotto:
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