Results 31 to 40 of about 7,558 (300)

SIFAT-SIFAT SPEKTRAL DAN STRUKTUR KOMBINATORIK PADA SISTEM POSITIF 2D

Barekeng, 2011
The dynamics of a 2D positive system depends on the pair of nonnegative square matrices that provide the updating of its local states. In this paper, several spectral properties, like finite memory, separablility and property L, which depend on the ...
RUDY WOLTER MATAKUPAN
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Theorems on Positive Data: On the Uniqueness of NMF [PDF]

, 2008
We investigate the conditions for which nonnegative matrix factorization (NMF) is unique and introduce several theorems which can determine whether the decomposition is in fact unique or not.
Pumbley, Mark, Plumbley, MD, Christensen, Mads Græsbøll; id_orcid, Hansen, LK, Lauerberg, Hans, Christensen, MG, Plumbley, Mark D., Jensen, Søren Holdt, Jensen, SH, Laurberg, Hans, Christensen, Mads Græsbøll, Hansen, Lars Kai, Laurberg, H   +12 more
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The almost semimonotone matrices

Special Matrices, 2019
A (strictly) semimonotone matrix A ∈ ℝn×n is such that for every nonzero vector x ∈ ℝn with nonnegative entries, there is an index k such that xk > 0 and (Ax)k is nonnegative (positive).
Wendler Megan
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On Factorizations of Upper Triangular Nonnegative Matrices of Order Three

Discrete Dynamics in Nature and Society, 2015
Let T3(N0) denote the semigroup of 3×3 upper triangular matrices with nonnegative integral-valued entries. In this paper, we investigate factorizations of upper triangular nonnegative matrices of order three.
Yi-Zhi Chen
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On the effect of the perturbation of a nonnegative matrix on its Perron eigenvector

, 1982
Elsner L, Johnson CR, Neumann MM. On the effect of the perturbation of a nonnegative matrix on its Perron eigenvector. Czechoslovak Mathematical Journal.
Elsner, Ludwig F., Elsner, Ludwig, Neumann, M., Johnson, Charles R., Johnson, C. R., Neumann, Michael M.   +5 more
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Factorizations of $k$-nonnegative matrices

Journal of Combinatorics, 2022
A matrix is $k$-nonnegative if all its minors of size $k$ or less are nonnegative. We give a parametrized set of generators and relations for the semigroup of $k$-nonnegative $n\times n$ invertible matrices in two special cases: when $k = n-1$ and when $k = n-2$, restricted to unitriangular matrices.
Chepuri, Sunita, Kulkarni, Neeraja, Suk, Joe, Tang, Ewin   +3 more
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Nonnegative low rank matrix approximation for nonnegative matrices [PDF]

Applied Mathematics Letters, 2020
25 pages 13 ...
Guang-Jing Song, Michael K. Ng 0001
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Positive Solutions for a System of Semipositone Fractional Difference Boundary Value Problems

Journal of Function Spaces, 2018
Using the fixed point index, we establish two existence theorems for positive solutions to a system of semipositone fractional difference boundary value problems.
Cheng Chen, Jiafa Xu, Donal O’Regan, Zhengqing Fu   +3 more
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Three observations on nonnegative matrices

, 1967
Some results on nonnegative matrices are proved, of which the following is representative: Let A = (aij) be a nonnegative row stochastic matrix. If [formula not included] is an eigenvalue of A, then [equation]
Hoffman, A. J.
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Singular M-matrices which may not have a nonnegative generalized inverse

Special Matrices, 2014
A matrix A ∈ ℝn×n is a GM-matrix if A = sI − B, where 0 < ρ(B) ≤ s and B ∈WPFn i.e., both B and Bthave ρ(B) as their eigenvalues and their corresponding eigenvector is entry wise nonnegative.
Sushama Agrawal N., Premakumari K., Sivakumar K.C.   +2 more
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