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On the Geometry of Some Special Projective Varieties / by Francesco Russo
(Lecture Notes of the Unione Matematica Italiana. ISSN:18629121 ; 18)
版 | 1st ed. 2016. |
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出版者 | (Cham : Springer International Publishing : Imprint: Springer) |
出版年 | 2016 |
本文言語 | 英語 |
大きさ | XXVI, 232 p : online resource |
著者標目 | *Russo, Francesco author SpringerLink (Online service) |
件 名 | LCSH:Algebraic geometry LCSH:Commutative algebra LCSH:Commutative rings LCSH:Geometry FREE:Algebraic Geometry FREE:Commutative Rings and Algebras FREE:Geometry |
一般注記 | Preface.-Introduction -- 1.Tangent cones, tangent spaces, tangent stars; secant, tangent and tangent star varieties to an algebraic variety -- 2.Basics of Deformation Theory of Rational Curves on Projective Varieties -- 3.Fulton-Hansen Connectedness Theorem, Scorza Lemma and their applications to projective geometry -- 4.Local quadratic entry locus manifolds and conic connected manifolds -- 5.Hartshorne Conjectures and Severi varieties -- 6.Varieties n-covered by curves of a fixed degree and the XJC -- 7. Hypersurfaces with vanishing hessian.-Bibliography Providing an introduction to both classical 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 smaller projective spaces, and the classification of extremal cases. It also provides a solution of Hartshorne’s Conjecture on Complete Intersections for the class of quadratic manifolds and new short proofs of previously known results, using the modern tools of Mori Theory and of rationally connected manifolds. The new approach to some of the problems considered can be resumed in the principle that, instead of studying a special embedded manifold uniruled by lines, one passes to analyze the original geometrical property on the manifold of lines passing through a general point and contained in the manifold.Once this embedded manifold, usually of lower codimension, is classified, one tries to reconstruct the original manifold, following a principle appearing also in other areas of geometry such as projective differential geometry or complex geometry HTTP:URL=https://doi.org/10.1007/978-3-319-26765-4 |
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電子ブック | 配架場所 | 資料種別 | 巻 次 | 請求記号 | 状 態 | 予約 | コメント | ISBN | 刷 年 | 利用注記 | 指定図書 | 登録番号 |
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Springer eBooks | 9783319267654 |
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EB00233239 |
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