xiv Contents
65.6. Composition of global FIO’s 365
65.7. Conjugation by a global FIO and the boundedness theorem 369
§66. Geometric optics at large 370
66.1. Generating functions and the Legendre transforms 370
66.2. Asymptotic solutions 374
66.3. The Maslov index 377
§67. Oblique derivative problem 381
67.1. Reduction to the boundary 381
67.2. Formulation of the oblique derivative problem 382
67.3. Model problem 384
67.4. First order differential equations with symbols depending
on x 387
67.5. The boundary value problem on ∂Ω 394
§68. Problems 399
Bibliography 403
Index 407
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