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Spectral enclosures for a class of block operator matrices
(Academic Press Inc Elsevier Science, 2020-01)
We prove new spectral enclosures for the non-real spectrum of a class of 2 X 2 block operator matrices with self-adjoint operators A and D on the diagonal and operators B and -B^* as off-diagonal entries. One of our main ...
Inertias of block band matrix completions
(Siam PublicationsPhiladelphiaEUA, 1998)
On a class of non-Hermitian matrices with positive definite Schur complements
(American Mathematical Society, 2019-03)
Given a Hermitian matrices A∈C^n×n and D∈C^m×m, and k > 0, we characterize under which conditions there exists a matrix K∈C^n×m with ∥K∥ < k such that the non-Hermitian block-matrix [AK∗A−AKD] has a positive (semi-) definite ...
A Parallel Framework with Block Matrices of a Discrete Fourier Transform for Vector-Valued Discrete-Time Signals
(Hindawi Publishing Corporation, 2015)
This paper presents a parallel implementation of a kind of discrete Fourier transform (DFT): the vector-valued DFT. The vector-valued DFT is a novel tool to analyze the spectra of vector-valued discrete-time signals. This ...
Physical properties of the Schur complement of local covariance matrices
(Iop Publishing LtdBristolInglaterra, 2007)
Controlling the generation of bilayer and multilayer vesicles in block copolymer/epoxy blends by a slow photopolymerization process
(Royal Society of Chemistry, 2017-09)
Vesicles are a highly attractive morphology to achieve in micellar dispersions of block copolymers (BCP) in epoxy thermosets due to the fact that small amounts can affect a large volume fraction of the matrix, a fact that ...
Criptografia em blocos: um enfoque em sua aplicação no ensino de matrizes
(Universidade Federal da Grande DouradosBrasilFaculdade de Ciências Exatas e TecnologiaPrograma de pós-graduação em MatemáticaUFGD, 2018)