作者: Jean-Michel BONY
DOI: 10.1016/B978-0-12-501658-2.50006-3
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摘要: Publisher Summary This chapter presents second microlocalization and discusses the propagation of singularities for semi-linear hyperbolic equations. Fourier integral operators prove that can be made along any Lagrangean submanifold. Using invariance by operators, it is not difficult to define classes mapping. Usual singular diffeomorphisms are particular cases a much larger class transformations. They well-behaved with respect 2-microlocal calculus. usual various operators.