Generalized Oscillatory Integrals and Fourier Integral Operators

Details Generalized Oscillatory Integrals and Fourier Integral Operators Generalized Oscillatory Integrals and Fourier Integral Operators

2006-07-27

arxiv.org/abs/math/0607706v1

Mathematics

Analysis of PDEs

Scientific paper

In this article, a theory of generalized oscillatory integrals (OIs) is developed whose phase functions as well as amplitudes may be generalized functions of Colombeau type. Based on this, generalized Fourier integral operators (FIOs) acting on Colombeau algebras are defined. This is motivated by the need of a general framework for partial differential operators with non-smooth coefficients and distribution data. The mapping properties of these FIOs are studied, as is microlocal Colombeau regularity for OIs and the influence of the FIO action on generalized wave front sets.

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