Results 91 to 100 of about 1,444 (195)

HIL modeling of systems using the multipole filter

Омский научный вестник
The article proposes an interface (multipole filter) that provides stability of the semi-natural modelling of the initial systems when the fragments of the system are represented by N-poles connected with each other by high intensity loopback (HIL).Thus,
M. N. Maksimov, S. M. Maksimova
doaj   +1 more source

Oblique projections and Schur complements

, 2000
Fil: Maestripieri, Alejandra Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Saavedra 15. Instituto Argentino de Matemática Alberto Calderón; Argentina.
Corach, Gustavo, Maestripieri, Alejandra Laura, Stojanoff, Demetrio   +2 more
openaire   +4 more sources

The weak (1,1) boundedness of Fourier integral operators with complex phases

Journal of the London Mathematical Society, Volume 113, Issue 3, March 2026.
Abstract Let T$T$ be a Fourier integral operator of order −(n−1)/2$-(n-1)/2$ associated with a canonical relation locally parametrised by a real‐phase function. A fundamental result due to Seeger, Sogge and Stein proved in the 90's gives the boundedness of T$T$ from the Hardy space H1$H^1$ into L1$L^1$. Additionally, it was shown by T.
Duván Cardona, Michael Ruzhansky
wiley   +1 more source

Manifestations of the Schur complement

Linear Algebra and its Applications, 1974
AbstractThis expository paper describes the ways in which a matrix theoretic construct called the Schur complement arises. Properties of the Schur complement are shown to have use in computing inertias of matrices, covariance matrices of conditional distributions, and other information of interest.
openaire   +2 more sources

Toral symmetries of collapsed ancient solutions to the homogeneous Ricci flow

Journal of the London Mathematical Society, Volume 113, Issue 3, March 2026.
Abstract Collapsed ancient solutions to the homogeneous Ricci flow on compact manifolds occur only on the total space of principal torus bundles. Under an algebraic assumption that guarantees flowing through diagonal metrics and a tameness assumption on the collapsing directions, we prove that such solutions have additional symmetries, that is, they ...
Anusha M. Krishnan, Francesco Pediconi, Sammy Sbiti   +2 more
wiley   +1 more source

On the Minimal Polynomials and the Inverses of Multilevel Scaled Factor Circulant Matrices

Abstract and Applied Analysis, 2014
Circulant matrices have important applications in solving various differential equations. The level-k scaled factor circulant matrix over any field is introduced.
Zhaolin Jiang
doaj   +1 more source

Two Preconditioners for Time-Harmonic Eddy-Current Optimal Control Problems

Mathematics
In this paper, we consider the numerical solution of a large complex linear system with a saddle-point form obtained by the discretization of the time-harmonic eddy-current optimal control problem.
Xin-Hui Shao, Jian-Rong Dong
doaj   +1 more source

Introduction of Sample Based Prior into the D-Bar Method Through a Schur Complement Property. [PDF]

IEEE Trans Med Imaging, 2020
Santos TBR, Nakanishi RM, Kaipio JP, Mueller JL, Lima RG.   +4 more
europepmc   +1 more source

Remarks on the Schur complement

Linear Algebra and its Applications, 1981
AbstractFirst, a generalization of the Schur determinantal formula is given. Using properties of quasidirect sums of matrices, a new characterization of the Schur complement is proved.
openaire   +2 more sources

Exponential Stabilization for a Class of Nonlinear Switched Systems with Mixed Delays under Asynchronous Switching

Complexity, 2018
This paper deals with the exponential stabilization problem for a class of nonlinear switched systems with mixed delays under asynchronous switching.
Yongzhao Wang
doaj   +1 more source