Foreword | p. ix |
Introduction to a topological study of Landau singularities | |
Introduction | p. 3 |
Differentiable manifolds | p. 7 |
Definition of a topological manifold | p. 7 |
Structures on a manifold | p. 7 |
Submanifolds | p. 10 |
The tangent space of a differentiable manifold | p. 12 |
Differential forms on a manifold | p. 17 |
Partitions of unity on a ∞ manifold | p. 20 |
Orientation of manifolds. Integration on manifolds | p. 22 |
Appendix on complex analytic sets | p. 26 |
Homology and cohomology of manifolds | p. 29 |
Chains on a manifold (following de Rham). Stokes' formula | p. 29 |
Homology | p. 31 |
Cohomology | p. 36 |
De Rham duality | p. 39 |
Families of supports. Poincaré's isomorphism and duality | p. 41 |
Currents | p. 45 |
Intersection indices | p. 49 |
Leray's theory of residues | p. 55 |
Division and derivatives of differential forms | p. 55 |
The residue theorem in the case of a simple pole | p. 57 |
The residue theorem in the case of a multiple pole | p. 61 |
Composed residues | p. 63 |
Generalization to relative homology | p. 64 |
Thom's isotopy theorem | p. 67 |
Ambient isotopy | p. 67 |
Fiber bundles | p. 70 |
Stratified sets | p. 73 |
Thom's isotopy theorem | p. 77 |
Landau varieties | p. 80 |
Ramification around Landau varieties | p. 85 |
Overview of the problem | p. 85 |
Simple pinching. Picard-Lefschetz formulae | p. 89 |
Study of certain singular points of Landau varieties | p. 98 |
Analyticity of an integral depending on a parameter | p. 109 |
Holomorphy of an integral depending on a parameter | p. 109 |
The singular part of an integral which depends on a parameter | p. 114 |
Ramification of an integral whose integrand is itself ramified | p. 127 |
Generalities on covering spaces | p. 127 |
Generalized Picard-Lefschetz formulae | p. 130 |
Appendix on relative homology and families of supports | p. 133 |
Technical notes | p. 137 |
Sources | p. 141 |
References | p. 143 |
Introduction to the study of singular integrals and hyperfunctions | |
Introduction | p. 147 |
Functions of a complex variable in the Nilsson class | p. 149 |
Functions in the Nilsson class | p. 149 |
Differential equations with regular singular points | p. 154 |
Functions in the Nilsson class on a complex analytic manifold | p. 157 |
Definition of functions in the Nilsson class | p. 157 |
A local study of functions in the Nilsson class | p. 159 |
Analyticity of integrals depending on parameters | p. 163 |
Single-valued integrals | p. 163 |
Multivalued integrals | p. 164 |
An example | p. 167 |
Sketch of a proof of Nilsson's theorem | p. 171 |
Examples: how to analyze integrals with singular integrands | p. 175 |
First example | p. 175 |
Second example | p. 183 |
Hyperfunctions in one variable, hyperfunctions in the Nilsson class | p. 185 |
Definition of hyperfunctions in one variable | p. 185 |
Differentiation of a hyperfunction | p. 186 |
The local nature of the notion of a hyperfunction | p. 187 |
The integral of a hyperfunction | p. 188 |
Hyperfunctions whose support is reduced to a point | p. 189 |
Hyperfunctions in the Nilsson class | p. 189 |
Introduction to Sato's microlocal analysis | p. 191 |
Functions analytic at a point x and in a direction | p. 191 |
Functions analytic in a field of directions on Rn | p. 191 |
Boundary values of a function which is analytic in a field of directions | p. 193 |
The microsingular support of a hyperfunction | p. 196 |
The microsingular support of an integral | p. 197 |
Construction of the homology sheaf of X over T | p. 201 |
Homology groups with local coefficients | p. 205 |
Supplementary references | p. 207 |
Index | p. 215 |
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