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Introduction to Incidence Geometry 1st ed. 2016 [Pehme köide]

  • Formaat: Paperback / softback, 372 pages, kõrgus x laius: 240x168 mm, kaal: 6414 g, XII, 372 p., 1 Paperback / softback
  • Sari: Frontiers in Mathematics
  • Ilmumisaeg: 17-Nov-2016
  • Kirjastus: Birkhauser Verlag AG
  • ISBN-10: 3319438107
  • ISBN-13: 9783319438108
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  • Formaat: Paperback / softback, 372 pages, kõrgus x laius: 240x168 mm, kaal: 6414 g, XII, 372 p., 1 Paperback / softback
  • Sari: Frontiers in Mathematics
  • Ilmumisaeg: 17-Nov-2016
  • Kirjastus: Birkhauser Verlag AG
  • ISBN-10: 3319438107
  • ISBN-13: 9783319438108
Teised raamatud teemal:
This book gives an introduction to the field of Incidence Geometry by discussing the basic families of point-line geometries and introducing some of the mathematical techniques that are essential for their study. The families of geometries covered in this book include among others the generalized polygons, near polygons, polar spaces, dual polar spaces and designs. Also the various relationships between these geometries are investigated. Ovals and ovoids of projective spaces are studied and some applications to particular geometries will be given. A separate chapter introduces the necessary mathematical tools and techniques from graph theory. This chapter itself can be regarded as a self-contained introduction to strongly regular and distance-regular graphs.





 This book is essentially self-contained, only assuming the knowledge of basic notions from (linear) algebra and projective and affine geometry. Almost all theorems are accompanied with proofs and a list of exercises with full solutions is given at the end of the book. This book is aimed at graduate students and researchers in the fields of combinatorics and incidence geometry.

Arvustused

This book grew out of lectures given by the author for students at the graduate level. The book contains 80 exercises with complete solutions. It can be used as a textbook for a graduate course, but is also suitable for self-study. (Norbert Knarr, zbMATH, 1376.51001, 2018)

Preface v
1 Introductory notions
1(10)
1.1 Basic notions regarding graphs
1(5)
1.2 Basic notions regarding point-line geometries
6(5)
2 Some classes of point-line geometries
11(28)
2.1 Some easy classes of point-line geometries
11(2)
2.2 Projective spaces
13(3)
2.3 Projective Grassmannians
16(1)
2.4 Affine spaces
17(1)
2.5 Nets
18(1)
2.6 Designs
19(2)
2.7 Generalized quadrangles
21(1)
2.8 Polar spaces
22(3)
2.9 Dual polar spaces
25(1)
2.10 Polar Grassmannians
26(1)
2.11 Half-spin geometries
27(1)
2.12 Near polygons
28(1)
2.13 Near (2d + 1)-gons
28(1)
2.14 Generalized polygons
29(1)
2.15 Partial geometries
30(1)
2.16 Partial quadrangles
31(1)
2.17 Semipartial geometries
32(1)
2.18 Copolar spaces
32(1)
2.19 Generalized Moore geometries
33(1)
2.20 Fischer spaces
34(1)
2.21 Inversive or Mobius planes
35(1)
2.22 Laguerre planes
36(1)
2.23 Minkowski planes
37(2)
3 Strongly regular and distance-regular graphs
39(22)
3.1 Basic properties and examples of strongly regular graphs
39(3)
3.2 The adjacency matrix of a strongly regular graph
42(8)
3.3 Distance-regular graphs
50(9)
3.4 Applications to point-line geometries
59(2)
4 Projective spaces
61(28)
4.1 A characterization of finite projective planes
61(2)
4.2 Caps of projective spaces
63(2)
4.3 Ovals and hyperovals of projective planes
65(6)
4.4 Ovoids of 3-dimensional projective spaces
71(4)
4.5 Hyperplanes and projective embeddings of point-line geometries
75(3)
4.6 Pseudo-embeddings and pseudo-hyperplanes of point-line geometries
78(11)
5 Generalized polygons
89(40)
5.1 Definition
89(2)
5.2 Basic properties
91(4)
5.3 Characterizations of generalized polygons
95(5)
5.4 Generalized quadrangles
100(7)
5.5 Isomorphisms between generalized quadrangles
107(7)
5.5.1 Isomorphism between W(F)D and Q(4, F)
107(1)
5.5.2 Necessary and sufficient conditions for W(F) and Q(4, F) to be isomorphic
108(3)
5.5.3 Isomorphism between Q-(5, F'/F) and the point-line dual H(3, F'/F)D of H(3, F'/F)
111(3)
5.6 The theorem of Feit and Higman
114(6)
5.7 The Higman and Haemers-Roos inequalities
120(2)
5.8 Known orders for finite generalized polygons
122(1)
5.9 Ovoids in generalized quadrangles
123(6)
6 Near polygons
129(36)
6.1 Definition and basic notions
129(2)
6.2 Genesis
131(2)
6.3 Near polygons with an order
133(1)
6.4 Parallel lines
134(1)
6.5 Substructures
134(4)
6.6 Product near polygons
138(6)
6.7 Existence of quads
144(3)
6.8 The point-quad and line-quad relations
147(3)
6.9 Dense near polygons
150(8)
6.10 Regular near polygons
158(7)
7 Polar spaces
165(86)
7.1 Veldkamp-Tits polar spaces
166(7)
7.2 Buekenhout-Shult polar spaces
173(8)
7.3 Quotient polar spaces
181(2)
7.4 A family of rank 3 polar spaces
183(5)
7.5 Polar spaces from sesquilinear forms
188(13)
7.6 Polar spaces arising from pseudo-quadrics
201(10)
7.7 Polar spaces having a thin line
211(7)
7.7.1 Direct sum of polar spaces
211(2)
7.7.2 Dualized projective spaces
213(5)
7.8 Some classes of polar spaces
218(27)
7.8.1 Some properties of finite fields
218(2)
7.8.2 Symplectic polar spaces
220(1)
7.8.3 Polar spaces arising from nonsingular quadrics
221(11)
7.8.4 Polar spaces arising from nonsingular Hermitian varieties
232(10)
7.8.5 Isomorphism between symplectic and parabolic polar spaces
242(1)
7.8.6 The generators of hyperbolic quadrics
243(2)
7.9 The classification of polar spaces
245(6)
8 Dual polar spaces
251(24)
8.1 Basic definitions and properties
251(6)
8.2 Some families of dual polar spaces
257(3)
8.3 Cameron's characterization of dual polar spaces
260(10)
8.4 Half-spin geometries
270(5)
9 Designs
275(28)
9.1 Basic definitions and properties
275(5)
9.2 Symmetric designs
280(2)
9.3 Hadamard matrices and designs
282(4)
9.4 The Bruck-Ryser-Chowla theorem for symmetric designs
286(5)
9.5 Biplanes
291(3)
9.6 Latin squares and designs
294(9)
9.6.1 Latin squares and quasigroups
294(3)
9.6.2 Mutually orthogonal latin squares and affine planes
297(2)
9.6.3 Steiner triple systems from commutative quasigroups
299(4)
A Exercises
303(52)
A.1 List of problems
303(9)
A.2 Solutions of the problems
312(43)
Bibliography 355(12)
Index 367