Buscar
Mostrando ítems 1-10 de 454
Homogeneous spaces, algebraic K-theory and cohomological dimension of fields
(European Mathematical Society, Suiza, 2022)
Let q be a non-negative integer. We prove that a perfect field K has cohomological dimension at most q + 1 if, and only if, for any finite extension L of K and for any homogeneous space Z under a smooth linear connected ...
Curves in homogeneous spaces and their contact with 1-dimensional orbits
(Springer, 2011-10-01)
Let alpha be a C(infinity) curve in a homogeneous space G/H. For each point x on the curve, we consider the subspace S(k)(alpha) of the Lie algebra G of G consisting of the vectors generating a one parameter subgroup whose ...
Muckenhoupt weights with singularities on closed lower dimensional sets in spaces of homogeneous type
(Elsevier, 2014-08)
We give sufficient conditions on a real number β and on a closed set F in a general space of homogeneous type (X,d,μ)(X,d,μ) in such a way that μ(B(x,d(x,F)))βμ(B(x,d(x,F)))β becomes a Muckenhoupt weight. In order to prove ...
On Newton-Sobolev spaces
(Kossuth Lajos Tudomanyegyetem, 2017-01)
Newton-Sobolev spaces, as presented by N. Shanmugalingam, describe a way to extend Sobolev spaces to the metric setting via upper gradients, for metric spaces with ´sucient´ paths of nite length. Sometimes, as is the case ...
Weighted norm inequalities for vector-valued singular integrals on homogeneous spaces
(Polish Acad Sciences Inst MathematicsWarsawPolónia, 2004)
EQUIGEODESICS ON FLAG MANIFOLDS
(Univ HoustonHoustonEUA, 2011)
Homogeneous geodesics in pseudo-Riemannian nilmanifolds
(De Gruyter, 2016-04)
We study the geodesic orbit property for nilpotent Lie groups N when endowed with a pseudo-Riemannian left-invariant metric. We consider this property with respect to different groups acting by isometries. When N acts on ...
Larotonda spaces: Homogeneous spaces and conditional expectations
(World Scientific, 2016-02)
We define a Larotonda space as a quotient space P = UA/UB of the unitary groups of C ∗ -algebras 1 ∈ B ⊂ A with a faithful unital conditional expectation Φ : A → B. In particular, B is complemented in A, a fact which implies ...
Equigeodesics on Generalized Flag Manifolds with Two Isotropy Summands
(Birkhauser Verlag AgBaselSuíça, 2011)
On s-set in space of homogeneous type
(Polish Academy of Sciences. Institute of Mathematics, 2015-01)
Let (X, d, μ) be a space of homogeneous type. We study the relationship between two types of s-sets: relative to a distance and relative to a measure. We find a condition on a closed subset F of X under which F is an s-set ...