Abstract
In the preceding lecture, we associated to each point of a projective variety X ⊂ ℙn a linear subspace of ℙ n. We investigate here how those planes vary on X, that is, the geometry of the Gauss map. Before we launch into this, however, we should take a moment to discuss a question that will be increasingly relevant to our analysis; the choice of our ground field K and in particular its characteristic.
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© 1992 Springer Science+Business Media New York
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Harris, J. (1992). Gauss Maps, Tangential and Dual Varieties. In: Algebraic Geometry. Graduate Texts in Mathematics, vol 133. Springer, New York, NY. https://doi.org/10.1007/978-1-4757-2189-8_15
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DOI: https://doi.org/10.1007/978-1-4757-2189-8_15
Publisher Name: Springer, New York, NY
Print ISBN: 978-1-4419-3099-6
Online ISBN: 978-1-4757-2189-8
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