Results 221 to 230 of about 2,788,589 (246)

Cognitive Rehabilitation and Functional Outcomes in Long COVID-Related Cognitive Impairment: A Randomized Clinical Trial.

JAMA Netw Open
Vanova M, Patel AMR, Scott I, Gilpin G, Manning EN, Ash C, Wittenberg P, Lim J, Hoare Z, Evans R, Bray N, Kipps CM, Devine C, Ahmed S, Dunne R, Koniotes A, Warren C, Chan D, Suarez-Gonzalez A.   +18 more
europepmc   +1 more source

Implied Motion as a Mechanism for Spontaneous Belief Computation in Humans

Christian P, Cahill J, Fecker A, Paskin M, Löfström R, Zook Z, Raslan A, Collins K, Guterstam A.   +8 more
europepmc   +1 more source

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Condition number of Bott–Duffin inverse and their condition numbers

Applied Mathematics and Computation, 2003
The paper studies the normwise relative condition number of the Bott-Duffin inverse and the corresponding condition number for the constrained linear systems \(Ax+y=b,x\in L,y\in L^{\bot }\). Since the condition number cannot be computed exactly, the authors consider the sensitivity of the problem ``the condition number of the condition number'' by ...
Yimin Wei 0001, Wei Xu
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Norms, Condition Numbers

2016
In the following chapter we are going to discuss the solution of a system of linear equations $$\displaystyle{ Ax = b }$$ (2.1) where A is an n × n real matrix: \(A \in \mathbb{R}^{n\times n},\,b \in \mathbb{R}^{n}\) is a given vector and \(x \in \mathbb{R}^{n}\) is the unknown vector.
Gisbert Stoyan, Agnes Baran
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Condition number of Drazin inverse and their condition numbers of singular linear systems

Applied Mathematics and Computation, 2003
Various condition numbers are given for the Drazin inverse of a singular square matrix and for singular linear systems.
Yimin Wei 0001, Guanglin Wang, Dingkun Wang   +2 more
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Condition Number Theorems in Optimization

SIAM Journal on Optimization, 2003
Summary: Condition numbers for optimization problems in Banach spaces are considered. Lower and upper estimates of the (suitably defined) distance from ill-conditioning are obtained in terms of the reciprocal of condition numbers. An approach is presented based on the metric regularity of the inverse to the arg min map.
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Comment on “condition number of Drazin inverse and their condition numbers of singular linear systems”

Applied Mathematics and Computation, 2008
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Jueping Chen, Zhaoliang Xu
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An Estimate for the Condition Number of a Matrix

SIAM Journal on Numerical Analysis, 1979
It is important in practice when solving linear systems to have an economical method for estimating the condition number $\kappa (A)$ of the matrix of coefficients. An algorithm involving $O(n^2 )$ arithmetic operations is described; it gives a reliable indication of the order of magnitude of $\kappa (A)$.
Cline, A. K., Moler, C. B., Stewart, G. W., Wilkinson, J. H.   +3 more
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A consideration on the condition number of extremely ill-conditioned matrices

2013 European Conference on Circuit Theory and Design (ECCTD), 2013
As for a matrix A we examine two problems: (a) To find the upper and the lower bound of Cond2(A) in terms of two coefficients p1 and pn-1 (see Section 2) of the characteristic polynomial of AA T, and (b) proof of existence of a matrix A having considerably larger condition number than that obtained in the previous papers. The connection between (a) and
Tetsuo Nishi, Siegfried M. Rump, Shin'ichi Oishi   +2 more
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