Projective Geometry and Formal Geometry

  • Lucian Bădescu

Part of the Monografie Matematyczne book series (MONOGRAFIE, volume 65)

Table of contents

  1. Front Matter
    Pages i-xiv
  2. Special Chapters of Projective Geometry

    1. Front Matter
      Pages 1-1
    2. Lucian Bădescu
      Pages 3-13
    3. Lucian Bădescu
      Pages 15-21
    4. Lucian Bădescu
      Pages 23-30
    5. Lucian Bădescu
      Pages 31-38
    6. Lucian Bădescu
      Pages 49-54
    7. Lucian Bădescu
      Pages 69-78
  3. Formal Functions in Algebraic Geometry

    1. Front Matter
      Pages 79-79
    2. Lucian Bădescu
      Pages 81-109
    3. Lucian Bădescu
      Pages 111-121
    4. Lucian Bădescu
      Pages 123-144
    5. Lucian Bădescu
      Pages 145-156
    6. Lucian Bădescu
      Pages 157-174
    7. Lucian Bădescu
      Pages 175-194
  4. Back Matter
    Pages 195-214

About this book


The aim of this monograph is to introduce the reader to modern methods of projective geometry involving certain techniques of formal geometry. Some of these methods are illustrated in the first part through the proofs of a number of results of a rather classical flavor, involving in a crucial way the first infinitesimal neighbourhood of a given subvariety in an ambient variety. Motivated by the first part, in the second formal functions on the formal completion X/Y of X along a closed subvariety Y are studied, particularly the extension problem of formal functions to rational functions.
The formal scheme X/Y, introduced to algebraic geometry by Zariski and Grothendieck in the 1950s, is an analogue of the concept of a tubular neighbourhood of a submanifold of a complex manifold. It is very well suited to study the given embedding Y\subset X. The deep relationship of formal geometry with the most important connectivity theorems in algebraic geometry, or with complex geometry, is also studied. Some of the formal methods are illustrated and applied to homogeneous spaces.
The book contains a lot of results obtained over the last thirty years, many of which never appeared in a monograph or textbook. It addresses to algebraic geometers as well as to those interested in using methods of algebraic geometry.


Algebraic geometry Complex analysis Formal geometry Homogenous spaces Meromorphic function Projective geometry Projective varieties manifold

Authors and affiliations

  • Lucian Bădescu
    • 1
  1. 1.Dipartimento di MatematicaUniversità degli Studi di GenovaGenovaItaly

Bibliographic information

  • DOI
  • Copyright Information Birkhäuser Verlag 2004
  • Publisher Name Birkhäuser, Basel
  • eBook Packages Springer Book Archive
  • Print ISBN 978-3-0348-9626-9
  • Online ISBN 978-3-0348-7936-1
  • Buy this book on publisher's site