Algebras of Singular Integral Operators with Kernels Controlled by Multiple Norms
Jan 2019 · American Mathematical Soc.
Ebook
141
Pages
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About this ebook
The authors study algebras of singular integral operators on R and nilpotent Lie groups that arise when considering the composition of Calderón-Zygmund operators with different homogeneities, such as operators occuring in sub-elliptic problems and those arising in elliptic problems. These algebras are characterized in a number of different but equivalent ways: in terms of kernel estimates and cancellation conditions, in terms of estimates of the symbol, and in terms of decompositions into dyadic sums of dilates of bump functions. The resulting operators are pseudo-local and bounded on for . . While the usual class of Calderón-Zygmund operators is invariant under a one-parameter family of dilations, the operators studied here fall outside this class, and reflect a multi-parameter structure.
About the author
Alexander Nagel: University of Wisconsin-Madison, WI,
Fulvio Ricci: Scuola Normale Superiore, Pisa, Italy,
Elias M. Stein: Princeton University, Princeton, NJ,
Stephen Wainger: University of Wisconsin-Madison, WI
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