Approximation and symbolic calculus for Toeplitz algebras on the Bergman space.
Daniel Suárez (2004)
Revista Matemática Iberoamericana
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Daniel Suárez (2004)
Revista Matemática Iberoamericana
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Alberto Elduque (2004)
Revista Matemática Iberoamericana
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The new construction given by Barton and Sudbery of the Freudenthal-Tits magic square, which includes the exceptional classical simple Lie algebras, will be interpreted and extended by using a pair of symmetric composition algebras, instead of the standard unital composition algebras.
Santos González, Consuelo Martínez (2003)
Revista Matemática Iberoamericana
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Nonassociative algebras can be applied, either directly or using their particular methods, to many other branches of Mathematics and other Sciences. Here emphasis will be given to two concrete applications of nonassociative algebras. In the first one, an application to group theory in the line of the Restricted Burnside Problem will be considered. The second one opens a door to some applications of non-associative algebras to Error correcting Codes and Cryptography.
Cho-Ho Chu, Ngai-Ching Wong (2004)
Revista Matemática Iberoamericana
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O. Villamayor U. (2008)
Revista Matemática Iberoamericana
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Lidia Maniccia, Marco Mughetti (2006)
Revista Matemática Iberoamericana
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We prove Fefferman's SAK Principle for a class of hypoelliptic operators on R whose nonnegative symbol vanishes anisotropically on the characteristic manifold.
Gérard Bourdaud, Massimo Lanza de Cristoforis, Winfried Sickel (2006)
Revista Matemática Iberoamericana
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We characterize the set of all functions f of R to itself such that the associated superposition operator T: g → f º g maps the class BV (R) into itself. Here BV (R), 1 ≤ p < ∞, denotes the set of primitives of functions of bounded p-variation, endowed with a suitable norm. It turns out that such an operator is always bounded and sublinear. Also, consequences for the boundedness of superposition operators defined on Besov spaces B ...
Karlheinz Gröchenig (2006)
Revista Matemática Iberoamericana
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We investigate the properties an exotic symbol class of pseudodifferential operators, Sjöstrand's class, with methods of time-frequency analysis (phase space analysis). Compared to the classical treatment, the time-frequency approach leads to striklingly simple proofs of Sjöstrand's fundamental results and to far-reaching generalizations.
B. R. Choe, H. Koo, Y. J. Lee (2008)
Revista Matemática Iberoamericana
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Sönke Blunck, Peer Christian Kunstmann (2003)
Revista Matemática Iberoamericana
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