Zero product preservers and orthogonality preservers on algebras of unbounded operators.
Timmermann, Werner (2005)
Mathematica Pannonica
Similarity:
Timmermann, Werner (2005)
Mathematica Pannonica
Similarity:
Dmitry Goldstein (1995)
Publicacions Matemàtiques
Similarity:
A new proof is obtained to the following fact: a Rickart C*-algebra satisfies polar decomposition. Equivalently, matrix algebras over a Rickart C*-algebra are also Rickart C*-algebras.
Ali, Faisal, Chaudhry, Muhammad Anwar (2009)
International Journal of Mathematics and Mathematical Sciences
Similarity:
Joel Feinstein (1991)
Studia Mathematica
Similarity:
V. Shul'Man (1994)
Studia Mathematica
Similarity:
The aim of this paper is to prove that derivations of a C*-algebra A can be characterized in the space of all linear continuous operators T : A → A by the conditions T(1) = 0, T(L∩R) ⊂ L + R for any closed left ideal L and right ideal R. As a corollary we get an extension of the result of Kadison [5] on local derivations in W*-algebras. Stronger results of this kind are proved under some additional conditions on the cohomologies of A.
Narcisse Randrianantoanina (1998)
Studia Mathematica
Similarity:
Let A be a C*-algebra. We prove that every absolutely summing operator from A into factors through a Hilbert space operator that belongs to the 4-Schatten-von Neumann class. We also provide finite-dimensional examples that show that one cannot replace the 4-Schatten-von Neumann class by the p-Schatten-von Neumann class for any p < 4. As an application, we show that there exists a modulus of capacity ε → N(ε) so that if A is a C*-algebra and with , then for every ε >0, the...
Chaudhry, Muhammad Anwar, Thaheem, A.B. (2004)
International Journal of Mathematics and Mathematical Sciences
Similarity:
Chaudhry, M.Anwar, Thaheem, A.B. (1998)
International Journal of Mathematics and Mathematical Sciences
Similarity:
Vukman, Joso, Kosi-Ulbl, Irena (2004)
International Journal of Mathematics and Mathematical Sciences
Similarity:
S. Sakai (1971)
Bulletin de la Société Mathématique de France
Similarity: