Results 141 to 150 of about 553 (167)

Hypoelliptic Operators

Mathematische Nachrichten, 1980
openaire   +1 more source

Hypoelliptic pseudodifferential operators

1967
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openaire   +3 more sources

Essential spectra and semigroups of perturbations of generalized SG-hypoelliptic pseudo-differential operators on $$L^{p}\left( {\mathbb {R}}^{n}\right) $$

Journal of Pseudo-Differential Operators and Applications, 2022
Viorel Catana, Catana Viorel
exaly  

Almost Hypoelliptic Differential Operators

Proceedings of the London Mathematical Society, 1969
openaire   +1 more source

HYPOELLIPTIC OPERATORS WITH MULTIPLE CHARACTERISTICS

Mathematics of the USSR-Sbornik, 1969
openaire   +1 more source

Dirichlet problem for some hypoelliptic operators

Proceedings of the Indian Academy of Sciences - Section A, 1997
Ramaswamy S
exaly  

A proof of the hypoellipticity of formally hypoelliptic differential operators

Communications on Pure and Applied Mathematics, 1961
openaire   +2 more sources

Semiclassical Hypoelliptic Estimates for Non-Selfadjoint Operators with Double Characteristics

Communications in Partial Differential Equations, 2010
Michael Hitrik, Karel Pravda-Starov
exaly  

A Priori Estimates and Fredholm Criteria for a Class of Regular Hypoelliptic Operators

Siberian Advances in Mathematics, 2023
exaly  

On the eigenvalues of a class of hypoelliptic operators

Mathematische Annalen, 1978
Johannes Sjöstrand
exaly