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quasipositive
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Quasipositive matrix — In mathematics, especially linear algebra, a matrix is called quasipositive if all of its elements are non negative except for those on the main diagonal, which are unconstrained. That is, a quasipositive matrix is any matrix A which… … Wikipedia
Metzler matrix — In mathematics, a Metzler matrix is a matrix in which all the off diagonal components are nonnegative (equal to or greater than zero) It is named after the American economist Lloyd Metzler. Metzler matrices appear in stability analysis of time… … Wikipedia
Z-matrix (mathematics) — In mathematics, the class of Z matrices are those matrices whose off diagonal entries are less than or equal to zero; that is, a Z matrix Z satisfies:Z=(z {ij});quad z {ij}leq 0, quad i eq j.Note that this definition coincides precisely with that … Wikipedia
Perron–Frobenius theorem — In linear algebra, the Perron–Frobenius theorem, proved by Oskar Perron (1907) and Georg Frobenius (1912), asserts that a real square matrix with positive entries has a unique largest real eigenvalue and that the corresponding… … Wikipedia
List of mathematics articles (Q) — NOTOC Q Q analog Q analysis Q derivative Q difference polynomial Q exponential Q factor Q Pochhammer symbol Q Q plot Q statistic Q systems Q test Q theta function Q Vandermonde identity Q.E.D. QED project QR algorithm QR decomposition Quadratic… … Wikipedia
