Results 21 to 30 of about 166,185,308 (253)

Binary positive semidefinite matrices and associated integer polytopes [PDF]

open access: yes, 2010
We consider the positive semidefinite (psd) matrices with binary entries, along with the corresponding integer polytopes.We begin by establishing some basic properties of these matrices and polytopes.
Sorensen, M M   +3 more
core   +4 more sources

A Maximum Entropy Approach to the Realizability of Spin Correlation Matrices

open access: yesEntropy, 2013
Deriving the form of the optimal solution of a maximum entropy problem, we obtain an infinite family of linear inequalities characterizing the polytope of spin correlation matrices.
Michele Pavon   +2 more
doaj   +1 more source

Interval observers design for systems with ostensible Metzler system matrices

open access: yesFrontiers in Aerospace Engineering, 2023
This paper attempts to resolve the problem concerning the interval observers design for linear systems with ostensible Metzler system matrices. Because system dynamics matrices are partially different from strictly Metzler structures, a solution is ...
Dušan Krokavec, Anna Filasová
doaj   +1 more source

Stability Analysis for a Class of Discrete-Time Nonhomogeneous Markov Jump Systems with Multiplicative Noises

open access: yesComplexity, 2018
This paper is concerned with a class of discrete-time nonhomogeneous Markov jump systems with multiplicative noises and time-varying transition probability matrices which are valued on a convex polytope. The stochastic stability and finite-time stability
Shaowei Zhou   +3 more
doaj   +1 more source

Some analogues of Knopp’s core theorem

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1979
Inequalities between certain functionals on the space of bounded real sequences are considered. Such inequalities being analogues of the classical theorem of Knopp on the core of a sequence.
I. J. Maddox
doaj   +1 more source

Further Inequalities for the Weighted Numerical Radius of Operators

open access: yesMathematics, 2022
This paper deals with the so-called A-numerical radius associated with a positive (semi-definite) bounded linear operator A acting on a complex Hilbert space H. Several new inequalities involving this concept are established.
Najla Altwaijry   +2 more
doaj   +1 more source

Nonlinear Fault-Tolerant Control Design for Singular Stochastic Systems With Fractional Stochastic Noise and Time-Delay

open access: yesIEEE Access, 2021
This work focuses on the stabilization issue for a class of singular stochastic systems against fractional Gaussian noise driven by fractional Brownian motion.
S. Sweetha   +3 more
doaj   +1 more source

A note on my paper: “On symmetric matrices whose eigenvalues satisfy linear inequalities” [PDF]

open access: yesProceedings of the American Mathematical Society, 1968
The first part of the theorem of the above paper states that if ois a closed convex set in real X1 ... Xn-space which is invariant under permutations of coordinates, and if C(o-) denotes the set of real symmetric nXn matrices whose eigenvalues X1, X. form the coordinates of points in a, then C(o) is convex. I am obliged to Professor R. T.
openaire   +2 more sources

Generalizations of the Kantorovich and Wielandt Inequalities with Applications to Statistics

open access: yesMathematics
By utilizing the properties of positive definite matrices, mathematical expectations, and positive linear functionals in matrix space, the Kantorovich inequality and Wielandt inequality for positive definite matrices and random variables are obtained ...
Yunzhi Zhang   +3 more
doaj   +1 more source

A Novel Approach to Delay-Variation-Dependent Stability Analysis of 2-D Discrete-Time Systems With Mixed Delays

open access: yesIEEE Access, 2019
In this paper, a stability analysis problem is studied for a class of two-dimensional (2-D) discrete-time systems with time-varying and distributed delays described by the second Fornasini-Marchesini (FM) model. First, new 2-D polynomials-based summation
Dan Peng, Hongshuang Xu
doaj   +1 more source

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