First integrals for non linear hyperbolic equations

Details First integrals for non linear hyperbolic equations First integrals for non linear hyperbolic equations

2007-04-20

arxiv.org/abs/0704.2674v2

Mathematics

Analysis of PDEs

38 pages, 1 figure, v2: some sign conventions have been changed, some minor corrections has been added

Scientific paper

Given a solution of a nonlinear wave equation on the flat space-time (with a real analytic nonlinearity), we relate its Cauchy data at two different times by nonlinear representation formulas in terms of asymptotic series. We first show how to construct formally these series by mean of generating functions based on an algebraic framework inspired by the construction of Fock spaces in quantum field theory. Then we build an analytic setting in which all these constructions really make sense and give rise to convergent series.

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