Results 31 to 40 of about 6,523,303 (221)
Possible spectra of totally positive matrices [PDF]
, 1984 For any given set S of n distinct positive numbers, we construct a symmetric n-by-n (strictly) totally positive matrix whose spectrum is S. Thus, in order to be the spectrum of an n-by-n totally positive matrix, it is necessary and sufficient that n ...
Johnson, Charles R., Barrett, Wayne W.
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Applied Water Science, 2017 The assessment of groundwater quality is an obligatory pre-requisite to developing countries like India with rural-based economy. Heavy metal concentration in groundwater from Besant Nagar to Sathankuppam, South Chennai was analyzed to assess the ...
S. G. D. Sridhar +6 more
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Characterizations of rectangular totally and strictly totally positive matrices [PDF]
, 2010 An n×m real matrix A is said to be totally positive (strictly totally positive) if every minor is nonnegative (positive). In this paper, we study characterizations of these classes of matrices by minors, by their full rank factorization and by their thin
Ricarte, Beatriz +2 more
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Seasonal variations in high time-resolved chemical compositions, sources, and evolution of atmospheric submicron aerosols in the megacity Beijing [PDF]
Atmospheric Chemistry and Physics, 2017 A severe regional haze problem in the megacity Beijing and surrounding areas, caused by fast formation and growth of fine particles, has attracted much attention in recent years.
W. Hu +9 more
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Inner totally positive matrices [PDF]
, 2004 Suppose A∈Mn is a staircase matrix with row and column staircase sequences ρ={ρ(1),ρ(2),…,ρ(n)}, γ={γ(1),γ(2),…,γ(n)}. A minor A(α;β)=det(A[α|β]) with α={α1…,αk},β={β1,…,βk} is said to be an inner minor of A if αi⩽γ(βi),βi⩽ρ(αi) for i=1,2,…,k.
Gladwell, G.M.L.
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Isospectral matrix flow maintaining staircase structure and total positivity of an initial matrix
Linear Algebra and its Applications, 2017 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Moghaddam, Mahsa R. +2 more
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A new description of equivariant cohomology for totally disconnected groups [PDF]
, 2008 We consider smooth actions of totally disconnected groups on simplicial complexes and compare different equivariant cohomology groups associated to such actions.
Voigt, C.
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Total positivity, spherical series, and hypergeometric functions of matrix argument
Journal of Approximation Theory, 1989 The paper is concerned with establishing the total positivity of a real function \(K(x,y)=f(xy)\), where f is analytic. With f there is, for each positive integer n, associated a certain spherical series \(\psi_{n,f}\) on a subset of \(S_ n\), the space of Hermitian \(n\times n\) matrices.
Gross, Kenneth I, Richards, Donald St.P
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MATRICES TOTALLY POSITIVE RELATIVE TO A TREE [PDF]
, 2009 It is known that for a totally positive (TP) matrix, the eigenvalues are positive and distinct and the eigenvector associated with the smallest eigenvalue is totally nonzero and has an alternating sign pattern.
Johnson,, Charles R. +8 more
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Square matrices with the inverse diagonal property
Kuwait Journal of ScienceWe identify the class of real square invertible matrices A for which the signs of the diagonal entries of A−1 match those of A, and begin their study. We say such matrices have the inverse diagonal property (IDP).
Susana Furtado +3 more
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