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Espacios de Fischer
(Universidad Michoacana de San Nicolás de Hidalgo, 2011-02)
For more than 5000 years, geometry has played an essential role in the development of mathematics, perhaps because sight is the sense with which the human being better perceives and understands what surrounds him. Geometry ...
On homogeneous polynomial solutions of generalized Moisil-Théodoresco systems in Euclidean space
(Universidad de La Frontera. Departamento de Matemática y EstadísticaUniversidade Federal de Pernambuco. Departamento de Matemática, 2010)
Range additivity, shorted operator and the Sherman-Morrison-Woodbury formula
(Elsevier, 2014-11-19)
We say that two operators A, B have the range additivity property if R(A + B) = R(A) + R(B). In this article we study the relationship between range additivity, shorted operator and certain Hilbert space decomposition known ...
Properties of finite dual fusion frames
(Elsevier, 2014-07)
A new notion of dual fusion frame has been recently introduced by the authors. In this article that notion is further motivated and it is shown that it is suitable to deal with questions posed in a finite-dimensional real ...
Operator inequalities related to the Corach–Porta–Recht inequality
(Elsevier Science Inc, 2012-05)
Using elementary techniques we prove that if A, B are invertible positive operators in B(H ), t ≤ 2 and r ∈ [ 1/2 , 3/2 ], then (2 + t) ||| ArXB2−r + A2−rXBr ≤ 2 ||| A 2X + tAXB + XB2 |||
for any unitarily invariant ...
Uma breve introdução aos Espaços de Lebesgue Generalizados
(DMA - Departamento de Matemática – São Cristóvão – PresencialUniversidade Federal de Sergipe, 2021)