Multi-parameter paraproducts.
Camil Muscalu, Jill Pipher, Terence Tao, Christoph Thiele (2006)
Revista Matemática Iberoamericana
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We prove that classical Coifman-Meyer theorem holds on any polidisc T or arbitrary dimension d ≥ 1.
Camil Muscalu, Jill Pipher, Terence Tao, Christoph Thiele (2006)
Revista Matemática Iberoamericana
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We prove that classical Coifman-Meyer theorem holds on any polidisc T or arbitrary dimension d ≥ 1.
M. Fabian, P. Hájek, V. Montesinos, V. Zizler (2005)
Revista Matemática Iberoamericana
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A quantitative version of Krein's Theorem on convex hulls of weak compact sets is proved. Some applications to weakly compactly generated Banach spaces are given.
Yahya Ould Hamidoune, Alain Plagne (2005)
Revista Matemática Iberoamericana
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P. Batchourine, C. Fefferman (2007)
Revista Matemática Iberoamericana
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Philippe Laurençot, Stéphane Mischler (2002)
Revista Matemática Iberoamericana
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Giovanna Citti, Giuseppe Tomassini (2004)
Revista Matemática Iberoamericana
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Zoltán Buczolich (2005)
Revista Matemática Iberoamericana
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In this paper we give a complete answer to the famous gradient problem of C. E. Weil. On an open set G ⊂ R we construct a differentiable function f: G → R for which there exists an open set Ω ⊂ R such that ∇f(p) ∈ Ω for a p ∈ G but ∇f(q) ∉ Ω for almost every q ∈ G. This shows that the Denjoy-Clarkson property does not hold in higher dimensions.
Herbert Koch, Winfried Sickel (2002)
Revista Matemática Iberoamericana
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María J. Carro, Joaquim Martín (2004)
Revista Matemática Iberoamericana
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Lassi Päivärinta, Alexander Panchenko, Gunther Uhlmann (2003)
Revista Matemática Iberoamericana
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