Электронный архив

Просмотр по теме "C*-algebra"

Просмотр по теме "C*-algebra"

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  • Grigoryan S.; Kuznetsova A. (2010)
    In this paper we consider a C*-subalgebra of the algebra of all bounded operators B(l2(X)) on the Hilbert space l2(X)) with one generating element T φ induced by a mapping φ of a set X into itself. We prove that such a ...
  • Kuznetsova A. (2019)
    © 2019, Pleiades Publishing, Ltd. The algebra under study belongs to the class of operator algebras generated by a family of partial isometries, satisfying some relations on the initial and final projections. In turn, this ...
  • Novikov A. (2019)
    © 2019, Pleiades Publishing, Ltd. We prove that the L1-norms associated with a positive elements aα is equivalent to the L1-norm associated with a positive element aβ if and only if it is equivalent to the natural norm of ...
  • Grigoryan S.; Kuznetsova A. (2010)
    In the paper, some properties of a singly generated C*-subalgebra of the algebra of all bounded operators B(l2(X)) on the Hilbert space l2(X) with the generator Tφ induced by a mapping φ of an infinite set X into itself ...
  • Grigoryan S.; Kuznetsova A. (2008)
    Let X be an infinite set and let φ be a given mapping of it into itself. We consider the C*-algebra C φ (X) with a single generating element T φ on Hilbert space l 2(X). We show that C φ (X) is isomorphic to C *-algebra ...
  • Grigoryan S.; Kuznetsova A. (2018)
    © 2018, Allerton Press, Inc. We continue the study of an operator algebra associated with a self-mapping ϕ on a countable setX which can be represented as a directed graph. This C*-algebra belongs to a class of operator ...
  • Неизвестный автор (2018)
    © 2018, Allerton Press, Inc. We study the operator algebra associated with a self-mapping ϕ on a countable set X which can be represented as a directed graph. The algebra is generated by the family of partial isometries ...
  • Novikov A.; Tikhonov O. (2015)
    © 2015, Pleiades Publishing, Ltd. We propose a list of inequalities which characterize central elements in von Neumann algebras and C*-algebras.
  • Бикчентаев Айрат Мидхатович (2013)
    We investigate connections between commutativity of operators and characterization of traces on C*-algebras
  • Bikchentaev Airat Midkhatovich; Fawwaz Khattab Omar (2021)
    We establish similarity between some tripotents and idempotents on a Hilbert space $H$ and obtain new results on differences and commutators of idempotents $P$ and $Q$. In the unital case, the difference $P - Q$ is associated ...
  • Bikchentaev Airat Midkhatovich (2017)
    We study trace of differences of idempotents in C*-algebras
  • Bikchentaev A. (2017)
    © 2017, Pleiades Publishing, Ltd.Suppose that P and Q are idempotents on a Hilbert space H, while Q = Q* and I is the identity operator in H. If U = P − Q is an isometry then U = U* is unitary and Q = I − P. We establish ...
  • Неизвестный автор (2018)
    © 2018, Pleiades Publishing, Ltd. Let ϕ be a trace on the unital C*-algebra A and Mϕbe the ideal of the definition of the trace ϕ. We obtain a C*analogue of the quantum Hall effect: if P,Q ∈ A are idempotents and P − Q ∈ ...
  • Bikchentaev A. (2015)
    © 2015, Allerton Press, Inc. We show that every measure of non-compactness on a W*-algebra is an ideal F-pseudonorm. We establish a criterion of the right Fredholm property of an element with respect to a W*-algebra. We ...
  • Bikchentaev A. (2019)
    © 2019, Allerton Press, Inc. We study ideal F-norms ‖·‖p, 0 <p < +∞ associated with a trace ϕ on a C*-algebra A. If A, B of A are such that |A|≤ |B|,then ‖A‖p ≤ ‖B‖p. We have ‖A‖p = ‖A*‖p for all A from A (0 <p < +∞)and a ...
  • Gumerov R. (2019)
    © 2019, Pleiades Publishing, Ltd. By the Toeplitz algebra we mean the reduced semigroup C*-algebra for the additive semigroup of non-negative integers. This article deals with inductive systems of Toeplitz algebras over ...
  • Gumerov R.N. (2020)
    © 2020, PleiadesT Publishing,T Ltd. Abstract: The note is concerned with inductive sequences of Toeplitz algebras. The Toeplitz algebra is the C*-subalgebra in the algebra of all bounded linear operators. This subalgebra ...
  • Bikchentaev A.M. (2020)
    © 2020, PleiadesT Publishing,T Ltd. Abstract—In year 2006 the author proposed an approach to the invariant subspace problem for an operator on a Hilbert space, based on projection-convex combinations in C*-algebras with ...
  • Novikov A. (2016)
    © 2016 Springer International PublishingIn this paper we suggest an approach for constructing an (Formula presented.)-type space for a positive selfadjoint operator affiliated with von Neumann algebra. For such operator ...
  • Novikov A. (2017)
    © 2016, Springer International Publishing.In this paper we suggest an approach for constructing an L1-type space for a positive selfadjoint operator affiliated with von Neumann algebra. For such operator we introduce a ...

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