Logo - springer
Slogan - springer

Mathematics - Algebra | Ruled Varieties - An Introduction to Algebraic Differential Geometry

Ruled Varieties

An Introduction to Algebraic Differential Geometry

Fischer, Gerd, Piontkowski, Jens

Softcover reprint of the original 1st ed. 2001, X, 142p.

Available Formats:
eBook
Information

Springer eBooks may be purchased by end-customers only and are sold without copy protection (DRM free). Instead, all eBooks include personalized watermarks. This means you can read the Springer eBooks across numerous devices such as Laptops, eReaders, and tablets.

You can pay for Springer eBooks with Visa, Mastercard, American Express or Paypal.

After the purchase you can directly download the eBook file or read it online in our Springer eBook Reader. Furthermore your eBook will be stored in your MySpringer account. So you can always re-download your eBooks.

 
$39.95

(net) price for USA

ISBN 978-3-322-80217-0

digitally watermarked, no DRM

Included Format: PDF

download immediately after purchase


learn more about Springer eBooks

add to marked items

Softcover
Information

Softcover (also known as softback) version.

You can pay for Springer Books with Visa, Mastercard, American Express or Paypal.

Standard shipping is free of charge for individual customers.

 
$59.95

(net) price for USA

ISBN 978-3-528-03138-1

free shipping for individuals worldwide

usually dispatched within 3 to 5 business days


add to marked items

Buchhandelstext
Gegenstand des Buches ist der Zusammenhang zwischen globaler algebraischer Geometrie, projektiver Varietäten und lokaler Differentialgeometrie. Es beschäftigt sich genauer mit sogenannten "Geregelten Varietäten", die Vereinigung von linearen Räumen sind. Das Buch ist entstanden aus Vorlesungen des ersten Autors für Studenten im Hauptstudium mit Grundkenntnissen in algebraischer Geometrie und führt an den Rand aktueller Forschung. Das Thema ist klassisch und heute wieder aktuell geworden. Die Grundlagen, die in der Literatur nur schwer zu finden sind, werden hier sorgfältig aufgeschrieben und mit elementaren Methoden zugänglich gemacht. Die neueren Ergebnisse aus der Forschung sind im letzten Kapitel dargestellt. Das Buch eignet sich z. B. gut für ein Seminar oder eine Vorlesung für Studierende, deren Schwerpunkt "Algebraische Geometrie" ist.

Inhalt
Review from Classical Differential and Projective Geometry - Grassmannians - Ruled Varieties - Tangent and Secant Varieties

Zielgruppe
1. Studierende der Mathematik an Universitäten im Hauptstudium 2. Mathematiker an Universitäten und Forschungsinstituten · Graduate and Advanced Graduate Students in Mathematics · Mathematicians

Über den Autor/Hrsg
Prof. Dr. em. Gerd Fischer war viele Jahre Professor für Mathematik an der Universität Düsseldorf. Er ist jetzt Gastprofessor an der Fakultät für Mathematik der TU München. Gerd Fischer ist Autor zahlreicher erfolgreicher Lehrbücher, u.a. der Linearen Algebra (vieweg studium - Grundkurs Mathematik). Dr. Jens Piontkowski ist Hochschuldozent am Mathematischen Institut der Heinrich-Heine-Universität Düsseldorf.

Content Level » Upper undergraduate

Keywords » Algebraische Geometrie - Differentialgeometrie - Gaussian curvature - Grassmannians - Ruled Varieties - Tangent and Secant Varieties - algebraic varieties - curvature - differential geometry

Related subjects » Algebra - Geometry & Topology - Probability Theory and Stochastic Processes

Table of contents 

0 Review from Classical Differential and Projective Geometry.- 0.1 Developable Rulings.- 0.2 Vanishing Gauß Curvature.- 0.3 Hessian Matrices.- 0.4 Classification of Developable Surfaces in ?3.- 0.5 Developable Surfaces in ?3(?).- 1 Grassmannians.- 1.1 Preliminaries.- 1.1.1 Algebraic Varieties.- 1.1.2 Rational Maps.- 1.1.3 Holomorphic Linear Combinations.- 1.1.4 Limit Direction of a Holomorphic Path.- 1.1.5 Radial Paths.- 1.2 Plücker Coordinates.- 1.2.1 Local Coordinates.- 1.2.2 The Plücker Embedding.- 1.2.3 Lines in ?3.- 1.2.4 The Plücker Image.- 1.2.5 Plücker Relations.- 1.2.6 Systems of Vector Valued Functions.- 1.3 Incidences and Duality.- 1.3.1 Equations and Generators in Terms of Plücker Coordinates.- 1.3.2 Flag Varieties.- 1.3.3 Duality of Grassmannians.- 1.3.4 Dual Projective Spaces.- 1.4 Tangents to Grassmannians.- 1.4.1 Tangents to Projective Space.- 1.4.2 The Tangent Space of the Grassmannian.- 1.5 Curves in Grassmannians.- 1.5.1 The Drill.- 1.5.2 Derived Curves.- 1.5.3 Sums and Intersections.- 1.5.4 Associated Curves and Curves with Prescribed Drill.- 1.5.5 Normal Form.- 2 Ruled Varieties.- 2.1 Incidence Varieties and Duality.- 2.1.1 Unions of Linear Varieties.- 2.1.2 Fano Varieties.- 2.1.3 Joins.- 2.1.4 Conormal Bundle and Dual Variety.- 2.1.5 Duality Theorem.- 2.1.6 The Contact Locus.- 2.1.7 The Dual Curve.- 2.1.8 Rational Curves.- 2.2 Developable Varieties.- 2.2.1 Rulings.- 2.2.2 Adapted Parameterizations.- 2.2.3 Germs of Rulings.- 2.2.4 Developable Rulings and Focal Points.- 2.2.5 Developability of Joins.- 2.2.6 Dual Varieties of Cones and Degenerate Varieties.- 2.2.7 Tangent and Osculating Scrolls.- 2.2.8 Classification of Developable One Parameter Rulings.- 2.2.9 Example of a “Twisted Plane”.- 2.2.10 Characterization of Drill One Curves.- 2.3 The Gauß Map.- 2.3.1 Definition of the Gauß Map.- 2.3.2 Linearity of the Fibers.- 2.3.3 Gauß Map and Developability.- 2.3.4 Gauß Image and Dual Variety.- 2.3.5 Existence of Varieties with Given Gauß Rank.- 2.4 The Second Fundamental Form.- 2.4.1 Definition of the Second Fundamental Form.- 2.4.2 The Degeneracy Space.- 2.4.3 The Degeneracy Map.- 2.4.4 The Singular and Base Locus.- 2.4.5 The Codimension of a Uniruled Variety.- 2.4.6 Fibers of the Gauß Map.- 2.4.7 Characterization of Gauß Images.- 2.4.8 Singularities of the Gauß Map.- 2.5 Gauß Defect and Dual Defect.- 2.5.1 Dual Defect of Segre Varieties.- 2.5.2 Gauß Defect and Singular Locus.- 2.5.3 Dual Defect and Singular Locus.- 2.5.4 Computation of the Dual Defect.- 2.5.5 The Surface Case.- 2.5.6 Classification of Developable Hypersurfaces.- 2.5.7 Dual Defect of Uniruled Varieties.- 2.5.8 Varieties with Very Small Dual Varieties.- 3 Tangent and Secant Varieties.- 3.1 Zak’s Theorems.- 3.1.1 Tangent Spaces, Tangent Cones, and Tangent Stars.- 3.1.2 Zak’s Theorem on Tangent and Secant Varieties.- 3.1.3 Theorem on Tangencies.- 3.2 Third and Higher Fundamental Forms.- 3.2.1 Definition.- 3.2.2 Vanishing of Fundamental Forms.- 3.3 Tangent Varieties.- 3.3.1 The Dimension of the Tangent Variety.- 3.3.2 Developability of the Tangent Variety.- 3.3.3 Singularities of the Tangent Variety.- 3.4 The Dimension of the Secant Variety.- List of Symbols.

Popular Content within this publication 

 

Articles

Read this Book on Springerlink

Services for this book

New Book Alert

Get alerted on new Springer publications in the subject area of Algebraic Geometry.