The Problem of Iterates in Some Classes of Ultradifferentiable Functions
We consider the problem of iterates in some spaces of ultradifferentiable classes in the sense of Braun, Meise and Taylor. In particular, we obtain a microlocal version, in this setting of functions, of the “Theorem of the iterates of Kotake and Narasimhan”.
KeywordsIterates of an operator wave front set ultradifferentiable functions
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