CONTENTS
1. Introduetion , , é
2. Arrangements of lines 4
2.1 Isomorphism-types of arrangements 4
2.2 Relations between the numbers of lines, vertices, edges and cells 9
2.3 Vertices of given multiplicity 16
2.4 Numbers of cells of various Mnds 25
2.5 Irrational arrangements 33
2.6 Arrangements associated with sets of points 36
2.7 Other problems and classifications 37
3. Arrangements of pseudolines and arrangements of curves ........................................... 40
3.1 Pseudolines and non-stretchable arrangements 40
3.2 Some resuits on arrangements of pseudolines 45
3.3 Arrangements of simple curves in the Euclidean plane 55
3.4 Generalizations 68
4. Spreads of curves 77
4.1. Definition and properties of spreads 77
4.2 Examples of spreads 81
4.3 Arrangements and spreads 85
4.4 Topological planes 86
References 92
Notes added in proof 112
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