Introduction to Algebraic Geometry
by Brendan HassettBuy New
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Summary
Table of Contents
| Preface | p. xi |
| Guiding problems | p. 1 |
| Implicitization | p. 1 |
| Ideal membership | p. 4 |
| Interpolation | p. 5 |
| Exercises | p. 8 |
| Division algorithm and Grobner bases | p. 11 |
| Monomial orders | p. 11 |
| Grobner bases and the division algorithm | p. 13 |
| Normal forms | p. 16 |
| Existence and chain conditions | p. 19 |
| Buchberger's Criterion | p. 22 |
| Syzygies | p. 26 |
| Exercises | p. 29 |
| Affine varieties | p. 33 |
| Ideals and varieties | p. 33 |
| Closed sets and the Zariski topology | p. 38 |
| Coordinate rings and morphisms | p. 39 |
| Rational maps | p. 43 |
| Resolving rational maps | p. 46 |
| Rational and unirational varieties | p. 50 |
| Exercises | p. 53 |
| Elimination | p. 57 |
| Projections and graphs | p. 57 |
| Images of rational maps | p. 61 |
| Secant varieties, joins, and scrolls | p. 65 |
| Exercises | p. 68 |
| Resultants | p. 73 |
| Common roots of univariate polynomials | p. 73 |
| The resultant as a function of the roots | p. 80 |
| Resultants and elimination theory | p. 82 |
| Remarks on higher-dimensional resultants | p. 84 |
| Exercises | p. 87 |
| Irreducible varieties | p. 89 |
| Existence of the decomposition | p. 90 |
| Irreducibility and domains | p. 91 |
| Dominant morphisms | p. 92 |
| Algorithms for intersections of ideals | p. 94 |
| Domains and field extensions | p. 96 |
| Exercises | p. 98 |
| Nullstellensatz | p. 101 |
| Statement of the Nullstellensatz | p. 102 |
| Classification of maximal ideals | p. 103 |
| Transcendence bases | p. 104 |
| Integral elements | p. 106 |
| Proof of Nullstellensatz I | p. 108 |
| Applications | p. 109 |
| Dimension | p. 111 |
| Exercises | p. 112 |
| Primary decomposition | p. 116 |
| Irreducible ideals | p. 116 |
| Quotient ideals | p. 118 |
| Primary ideals | p. 119 |
| Uniqueness of primary decomposition | p. 122 |
| An application to rational maps | p. 128 |
| Exercises | p. 131 |
| Projective geometry | p. 134 |
| Introduction to projective space | p. 134 |
| Homogenization and dehomogenization | p. 137 |
| Projective varieties | p. 140 |
| Equations for projective varieties | p. 141 |
| Projective Nullstellensatz | p. 144 |
| Morphisms of projective varieties | p. 145 |
| Products | p. 154 |
| Abstract varieties | p. 156 |
| Exercises | p. 162 |
| Projective elimination theory | p. 169 |
| Homogeneous equations revisited | p. 170 |
| Projective elimination ideals | p. 171 |
| Computing the projective elimination ideal | p. 174 |
| Images of projective varieties are closed | p. 175 |
| Further elimination results | p. 176 |
| Exercises | p. 177 |
| Parametrizing linear subspaces | p. 181 |
| Dual projective spaces | p. 181 |
| Tangent spaces and dual varieties | p. 182 |
| Grassmannians: Abstract approach | p. 187 |
| Exterior algebra | p. 191 |
| Grassmannians as projective varieties | p. 197 |
| Equations for the Grassmannian | p. 199 |
| Exercises | p. 202 |
| Hilbert polynomials and the Bezout Theorem | p. 207 |
| Hilbert functions defined | p. 207 |
| Hilbert polynomials and algorithms | p. 211 |
| Intersection multiplicities | p. 215 |
| Bezout Theorem | p. 219 |
| Interpolation problems revisited | p. 225 |
| Classification of projective varieties | p. 229 |
| Exercises | p. 231 |
| Notions from abstract algebra | p. 235 |
| Rings and homomorphisms | p. 235 |
| Constructing new rings from old | p. 236 |
| Modules | p. 238 |
| Prime and maximal ideals | p. 239 |
| Factorization of polynomials | p. 240 |
| Field extensions | p. 242 |
| Exercises | p. 244 |
| Bibliography | p. 246 |
| Index | p. 249 |
| Table of Contents provided by Ingram. All Rights Reserved. |
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