Titlebook: On the Geometry of Some Special Projective Varieties; Francesco Russo Book 2016 Springer International Publishing Switzerland 2016 14N05,1

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faction

Tangent Cones, Tangent Spaces, Tangent Stars: Secant, Tangent, Tangent Star and Dual Varieties of aes to the involved varieties. We end the chapter by recalling the definition of dual variety, its first properties, the definitions of Gauss maps and the relations with reflexivity. Some exercises are introduced to complement the material presented.

過度

1862-9113 l and modern techniques in projective algebraic geometry, this monograph treats the geometrical properties of varieties embedded in projective spaces,?their secant and tangent lines, the behavior of tangent linear spaces, the algebro-geometric and topological obstructions to their embedding into?sma

Respond

The Hilbert Scheme of Lines Contained in a Variety and Passing Through a General Point,, we show in an elementary way that a lot of homogeneous varieties admit only trivial extensions, that is, those obtained by taking the cone .(.,?. ) with ., by constructing explicitly the cone via the study of the singularities of the corresponding Hilbert schemes of lines through a general point of ..

LAP

Local Quadratic Entry Locus Manifolds and Conic Connected Manifolds,o (Compos. Math. 144:949–962, 2008) and of Ionescu and Russo (Math. Res. Lett. 21:1137–1154, 2014) on dual defective manifolds. In particular, an astonishing simple proof of the famous Landman Parity Theorem for dual defective manifolds appears as an application of the tools developed in Chap.?.

sinoatrial-node

Hartshorne Conjectures and Severi Varieties,ng the variety ., which essentially follows the approach of Zak in (Tangents and Secants of Algebraic Varieties. Translations of Mathematical Monographs, vol. 127. American Mathematical Society, Providence, 1993).

pester

Lecture Notes of the Unione Matematica Italianahttp://image.papertrans.cn/o/image/701171.jpg

pulse-pressure

https://doi.org/10.1007/978-3-319-26765-414N05,14M07,14M10,14M22,14E30,14J70,14E05; Secant varieties; Hartshorne Conjecture on Complete interse

Psa617

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