- Quasipositive matrix
In
mathematics , especiallylinear algebra , a matrix is called quasipositive if all of its elements arenon-negative except for those on the main diagonal, which are unconstrained. That is, a quasipositive matrix is any matrix "A" which satisfies:
Quasipositive matrices are also sometimes referred to as -matrices, as a "Z"-matrix is equivalent to a negated quasipositive matrix.
The exponential of a quasipositive matrix is a nonnegative matrix.
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