Results 41 to 50 of about 1,095,836 (281)

Matrix Analysis for Continuous-Time Markov Chains

open access: yesSpecial Matrices, 2021
Continuous-time Markov chains have transition matrices that vary continuously in time. Classical theory of nonnegative matrices, M-matrices and matrix exponentials is used in the literature to study their dynamics, probability distributions and other ...
Le Hung V., Tsatsomeros M. J.
doaj   +1 more source

The inverse M-matrix problem

open access: yesLinear Algebra and its Applications, 1977
AbstractOne aspect of the inverse M-matrix problem can be posed as follows. Given a positive n × n matrix A=(aij) which has been scaled to have unit diagonal elements and off-diagonal elements which satisfy 0 < y ⩽ aij ⩽ x < 1, what additional element conditions will guarantee that the inverse of A exists and is an M-matrix?
openaire   +2 more sources

Inferring network connectivity by delayed feedback control. [PDF]

open access: yesPLoS ONE, 2011
We suggest a control based approach to topology estimation of networks with N elements. This method first drives the network to steady states by a delayed feedback control; then performs structural perturbations for shifting the steady states M times ...
Dongchuan Yu, Ulrich Parlitz
doaj   +1 more source

On the decay of the inverse of matrices that are sum of Kronecker products

open access: yes, 2013
Decay patterns of matrix inverses have recently attracted considerable interest, due to their relevance in numerical analysis, and in applications requiring matrix function approximations.
Canuto, Claudio   +2 more
core   +1 more source

Colorectal cancer‐derived FGF19 is a metabolically active serum biomarker that exerts enteroendocrine effects on mouse liver

open access: yesMolecular Oncology, EarlyView.
Meta‐transcriptome analysis identified FGF19 as a peptide enteroendocrine hormone associated with colorectal cancer prognosis. In vivo xenograft models showed release of FGF19 into the blood at levels that correlated with tumor volumes. Tumoral‐FGF19 altered murine liver metabolism through FGFR4, thereby reducing bile acid synthesis and increasing ...
Jordan M. Beardsley   +5 more
wiley   +1 more source

Execute Elementary Row and Column Operations on the Partitioned Matrix to Compute M-P Inverse A†

open access: yesAbstract and Applied Analysis, 2014
We first study the complexity of the algorithm presented in Guo and Huang (2010). After that, a new explicit formula for computational of the Moore-Penrose inverse A† of a singular or rectangular matrix A.
Xingping Sheng
doaj   +1 more source

Ultrametric Matrices and the Geometric Inverse M-Matrix Problem [PDF]

open access: yes, 2015
We describe the symmetric inverse M-matrix problem from a geometric viewpoint. The central questioninthegeometriccontextis,whichpropertiesthelowerdimensionalfacetsofann-simplex S guarantee that S itself has no obtuse dihedral angles. The simplest but strongest of such properties is regularity of the triangular facets.
Apo Cihangir, Jan Brandts
openaire   +1 more source

Network divergence analysis identifies adaptive gene modules and two orthogonal vulnerability axes in pancreatic cancer

open access: yesMolecular Oncology, EarlyView.
Tumors contain diverse cellular states whose behavior is shaped by context‐dependent gene coordination. By comparing gene–gene relationships across biological contexts, we identify adaptive transcriptional modules that reorganize into distinct vulnerability axes.
Brian Nelson   +9 more
wiley   +1 more source

New type of chaos synchronization in discrete-time systems: the F-M synchronization

open access: yesOpen Physics, 2018
In this paper, a new type of synchronization for chaotic (hyperchaotic) maps with different dimensions is proposed. The novel scheme is called F – M synchronization, since it combines the inverse generalized synchronization (based on a functional ...
Ouannas Adel   +5 more
doaj   +1 more source

Fractional Inversion in Krylov Space

open access: yes, 1998
The fractional inverse $M^{-\gamma}$ (real $\gamma >0$) of a matrix $M$ is expanded in a series of Gegenbauer polynomials. If the spectrum of $M$ is confined to an ellipse not including the origin, convergence is exponential, with the same rate as for ...
B. Bunk, Boriçi, Manteuffel
core   +1 more source

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