Results 161 to 170 of about 1,062,474 (215)

Oscillator representations and systems of ordinary differential equations. [PDF]

Proc Natl Acad Sci U S A, 2001
Parmeggiani A, Wakayama M.
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Local analytic hypoellipticity for square(b) on nondegenerate Cauchy-Riemann manifolds. [PDF]

Proc Natl Acad Sci U S A, 1978
Tartakoff DS.
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Reduction, the trace formula, and semiclassical asymptotics. [PDF]

Proc Natl Acad Sci U S A, 1987
Guillemin V, Uribe A.
europepmc   +1 more source

The analytic calculation of the index of elliptic equations. [PDF]

Proc Natl Acad Sci U S A, 1967
Calderón AP.
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Symplectic geometry and positivity of pseudo-differential operators. [PDF]

Proc Natl Acad Sci U S A, 1982
Fefferman C, Phong DH.
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PSEUDODIFFERENTIAL OPERATORS

Modulation Spaces, 2020
Árpád Bényi, Kasso A. Okoudjou
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Perturbations by lower order terms do not destroy the global hypoellipticity of certain systems of pseudodifferential operators defined on torus

Mathematische Nachrichten, 2023
We introduce a new class of smooth pseudodifferential operators on the torus whose calculus allows us to show that global hypoellipticity with a finite loss of derivatives of certain systems of pseudodifferential operators is stable under perturbations ...
I. A. Ferra, G. Petronilho
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Pseudodifferential Operators

Introduction to Partial Differential Equations, 2005
3 Fourier Transformation 10 3.1 Definition and Basic Properties . . . . . . . . . . . . . . . . . . . . . 10 3.2 Rapidly decreasing functions – S(R) . . . . . . . . . . . . . . . . . . 12 3.3 Ex-course: Fréchet spaces . . . . . . . . . . . . . . . . . . .
H. Abels
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Dynamics of Resonances for 0th Order Pseudodifferential Operators

Communications in Mathematical Physics, 2020
We study the dynamics of resonances of analytic perturbations of 0th order pseudodifferential operators P(s). In particular, we prove a Fermi golden rule for resonances of P(s) at embedded eigenvalues of P=P(0)\documentclass[12pt]{minimal} \usepackage ...
Jian Wang
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On compactness of commutators of multiplication and bilinear pseudodifferential operators and a new subspace of BMO

, 2020
It is known that the compactness of the commutators of point-wise multiplication with bilinear homogeneous Calderon–Zygmund operators acting on product of Lebesgue spaces is characterized by the multiplying function being in the space CMO.
R. Torres, Qingying Xue
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