Author:
Bergamasco Adalberto P.,Zani Sérgio Luís
Abstract
AbstractWe show that almost all perturbations P — λ, λ € C, of an arbitrary constant coefficient partial differential operator P are globally hypoelliptic on the torus. We also give a characterization of the values λ € C for which the operator is globally hypoelliptic; in particular, we show that the addition of a term of order zero may destroy the property of global hypoellipticity of operators of principal type, contrary to that happens with the usual (local) hypoellipticity.
Publisher
Canadian Mathematical Society
Cited by
3 articles.
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