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Mostrando ítems 41-46 de 46
Artículo
Holomorphic quadratic differentials and the Bernstein problem in Heisenberg space
(American Mathematical Society, 2009)
We classify the entire minimal vertical graphs in the Heisenberg group Nil3 endowed with a Riemannian left-invariant metric. This classi cation, which provides a solution to the Bernstein problem in Nil3, is given in terms ...
Artículo
A characterization of constant mean curvature surfaces in homogeneous 3-manifolds
(Elsevier, 2007)
It has been recently shown by Abresch and Rosenberg that a cer- tain Hopf differential is holomorphic on every constant mean curvature surface in a Riemannian homogeneous 3-manifold with isometry group of dimension 4. ...
Artículo
Size of graphs with high girth
(Elsevier, 2007)
Let n≥4 be a positive integer and let ex (ν;{C3, . . . , Cn}) denote the maximum number of edges in a {C3, . . . , Cn}-free simple graph of order ν. This paper givesthe exact value of this function for all νup to ⌊(16n−15)/5⌋. ...
Artículo
Vector measures: where are their integrals?
(Springer, 2009)
Let ν be a vector measure with values in a Banach space Z. The integration map Iν:L1(ν)→Z, given by f↦∫fdν for f ∈ L 1(ν), always has a formal extension to its bidual operator I∗∗ν:L1(ν)∗∗→Z∗∗. So, we may consider the ...
Artículo
Multiplication operators on spaces of integrable functions with respect to a vector measure
(Elsevier, 2008)
We study continuity and other properties related to some kind of compactness of multiplication operators between different spaces of pth power integrable scalar functions with respect to a vector measure.
Artículo
Complete maximal surfaces in static Robertson–Walker 3-spaces
(Springer, 2007)
We construct a large family of complete maximal surfaces in the static Robertson–Walker 3-spaces with negative base curvature. These examples provide a wide variety of non-standard foliations of such spaces by entire ...