Results 111 to 120 of about 9,067 (308)
Isometry of Polish metric spaces
, 2014 We consider the equivalence relation of isometry of separable, complete metric spaces, and show that any equivalence relation induced by a Borel action of a Polish group on a Polish space is Borel reducible to this isometry relation. We also consider the
John D. Clemens
core
, 1971 A bounded linear operator A A on a Hilbert space H \mathcal {H} is called reflexive if any bounded linear operator which leaves invariant the invariant subspaces of A A is a limit of ...
James A. Deddens
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Multiplication Operators on Cesàro Sequence Spaces
Demonstratio Mathematica, 2016 In this paper we characterize the compact, invertible and Fredholm multiplication operators on Cesàro sequence spaces.
Komal B. S., Pandoh Suruchi, Raj Kuldip
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Complex Analysis and Operator Theory, 2011 Let \(\mathcal H\) be a Hilbert space and \({\mathcal B}({\mathcal H})\) denote the space of bounded operators on \(\mathcal H\). For \(A \in {\mathcal B}({\mathcal H})\), let \(R(A)\) denote its range space and \(N(A)\) be its null space. \(T \in {\mathcal B}({\mathcal H})\) is called a partial isometry if \(T\) is an isometry between \(N(T)^{\perp}\)
Andruchow, Esteban +2 more
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The Anatomical Record, EarlyView.Abstract Neandertals are known to possess very distinctive traits in their bony labyrinth morphology, such as an inferiorly positioned posterior canal and a very low number of turns in the cochlea. Hence, the inner ear has been often used to assess the Neandertal status of fragmentary fossils.
Alessandro Urciuoli +6 more
wiley +1 more source
Fixed Points of Isometries [PDF]
Nagoya Mathematical Journal, 1958 The purpose of this paper is to prove the followingTheorem. Let M be a Riemannian manifold of dimension n and let ξ be a Killing vector field (i.e., infinitesimal isometry) of M. Let F be the set of points x of M where ξ vanishes and let F = ∪ Vi, where the Vi’s are the connected components of F. Then (assuming F to be non-empty)
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The Anatomical Record, EarlyView.Abstract Muscle architecture is a major determinant of muscle performance and, in mammalian lineages, has been correlated with both feeding ecology and locomotor behaviors. Over the past decade, contrast‐enhanced micro‐CT (DiceCT) has emerged as an alternative to traditional dissection‐based measurement.
Aleksandra Ratkiewicz +5 more
wiley +1 more source
Isometry groups of borel randomizations
, 2018 We study global dynamical properties of the isometry group of the Borel randomization of a separable complete structure. In particular, we show that if properties such as the Rohklin property, topometric generics, extreme amenability hold for the ...
Zamora Calero, Rafael, Berenstein, Alex
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Perturbation of m-Isometries by Nilpotent Operators
Abstract and Applied Analysis, 2014 We prove that if T is an m-isometry on a Hilbert space and Q an n-nilpotent operator commuting with T, then T+Q is a 2n+m-2-isometry. Moreover, we show that a similar result for m, q-isometries on Banach spaces is not true.
Teresa Bermúdez +3 more
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Isometries of tridiagonal algebras [PDF]
Pacific Journal of Mathematics, 1989 Alg \({\mathcal L}\) denotes the algebra of bounded operators which leave invariant all of the elements in \({\mathcal L}\) that is a family of subspaces. When Alg \({\mathcal L}\) is some tridiagonal algebra, the author proves that if \(\phi: Alg {\mathcal L}\to Alg {\mathcal L}\) is a linear surjective isometry, then there exist unitary operators W ...
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