Results 101 to 110 of about 1,444 (195)

Using Random Butterfly Transformations in Parallel Schur Complement-Based Preconditioning [PDF]

Annals of computer science and information systems, 2015
Marc Baboulin, Aygul Jamal, Masha Sosonkina   +2 more
doaj   +1 more source

Schur complement dominant operator matrices

Journal of Functional Analysis
46 ...
openaire   +2 more sources

What is a proper graph Laplacian? An operator-theoretic framework for graph diffusion

Special Matrices
We introduce an operator-theoretic definition of a proper graph Laplacian as any matrix associated with a given graph that can be expressed as the composition of a divergence and a gradient operator, with the gradient acting between graph-related spaces ...
Estrada Ernesto
doaj   +1 more source

A Schur Complement Cheeger Inequality

, 2018
Cheeger's inequality shows that any undirected graph $G$ with minimum nonzero normalized Laplacian eigenvalue $ _G$ has a cut with conductance at most $O(\sqrt{ _G})$. Qualitatively, Cheeger's inequality says that if the relaxation time of a graph is high, there is a cut that certifies this.
openaire   +4 more sources

Optimization Problems of Hermitian Quadratic Matrix-Valued Functions and Applications

Axioms
In this paper, we investigate optimization problems for a Hermitian quadratic matrix-valued function involving two variable matrices. We derive algebraic formulas for the maximal and minimal ranks and partial inertias of this function based on a ...
Sihem Guerarra
doaj   +1 more source

Mesh-free high-resolution simulation of cerebrocortical oxygen supply with fast Fourier preconditioning. [PDF]

Int J Numer Method Biomed Eng, 2023
Ventimiglia T, Linninger AA.
europepmc   +1 more source

Hybrid Cramér-Rao Bound for Quantum Bayes Point Estimation with Nuisance Parameters. [PDF]

Entropy (Basel)
Zhang J, Suzuki J.
europepmc   +1 more source

Use of an anatomical atlas in real-time EIT reconstructions of ventilation and pulsatile perfusion in preterm infants. [PDF]

Sci Rep
Rocheleau CJ, Overton TD, da Rosa NB, Saulnier GJ, Shishvan OR, Baker CD, Enzer KG, Mueller JL.   +7 more
europepmc   +1 more source

Fast Numerical Solvers for Parameter Identification Problems in Mathematical Biology. [PDF]

J Sci Comput
Benková K, Pearson JW, Ptashnyk M.
europepmc   +1 more source

Factorization norms and an inverse theorem for MaxCut. [PDF]

Math Ann
Balla I, Hambardzumyan L, Tomon I.
europepmc   +1 more source