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Anisotropic classes of inhomogeneous pseudodifferential symbols

✍ Scribed by Árpád Bényi, Marcin Bownik


Book ID
120722083
Publisher
Universitat de Barcelona
Year
2011
Tongue
Spanish
Weight
242 KB
Volume
64
Category
Article
ISSN
0010-0757

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Subunit Balls for Symbols of Pseudodiffe
✍ Alberto Parmeggiani 📂 Article 📅 1997 🏛 Elsevier Science 🌐 English ⚖ 880 KB

In this work we shall study a definition of subunit ball for non-negative symbols of sub-elliptic pseudodifferential operators, extending in phase-space the one given by Stein, Nagel, and Wainger in the differential-operator case. Using microlocal methods introduced by Fefferman and Phong, we prove