Concept

Q-matrix

In mathematics, a Q-matrix is a square matrix whose associated linear complementarity problem LCP(M,q) has a solution for every vector q. M is a Q-matrix if there exists d > 0 such that LCP(M,0) and LCP(M,d) have a unique solution. Any P-matrix is a Q-matrix. Conversely, if a matrix is a Z-matrix and a Q-matrix, then it is also a P-matrix.

Official source

https://en.wikipedia.org/wiki/Q-matrix

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