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Tangents and Secants of Algebraic Varieties
F. L. Zak

Translations of Mathematical Monographs
1993; 164 pp; softcover
Volume: 127
Reprint/Revision History:
reprinted 2005
ISBN-10: 0-8218-3837-7
ISBN-13: 978-0-8218-3837-2
List Price: US$68
Member Price: US$54.40
Order Code: MMONO/127.S
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During the last twenty years algebraic geometry has experienced a remarkable shift from development of abstract theories to investigation of concrete properties of projective varieties. Many problems of classical algebraic geometry centered on linear systems, projections, embedded tangent spaces, and so on. Use of modern techniques has made it possible to make progress on some of these problems. Following these themes, this book covers these topics, among others: tangent spaces to subvarieties of projective spaces and complex tori, projections of algebraic varieties, classification of Severi varieties, higher secant varieties, and classification of Scorza varieties over an algebraically closed field of characteristic zero.


Research mathematicians.

Table of Contents

  • Theorem on tangencies and Gauss maps
  • Projections of algebraic varieties
  • Varieties of small codimension corresponding to orbits of algebraic groups
  • Severi varieties
  • Linear systems of hyperplane sections on varieties of small codimension
  • Scorza varieties
  • References
  • Index of notations
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