Some remarks on varieties with degenerate Gauss image
classification
🧮 math.AG
math.DG
keywords
varietiesdegenerategaussimagesevericharacterizedconsiderexamples
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We consider projective varieties with degenerate Gauss image whose focal hypersurfaces are non-reduced schemes. Examples of this situation are provided by the secant varieties of Severi and Scorza varieties. The Severi varieties are moreover characterized by a uniqueness property.
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