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Reference.org
Q-matrix
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<p>In <a href="/facts/Mathematics/pxTouaz4">mathematics</a>, a Q-matrix is a square <a href="/facts/Matrix_(mathematics)/qa8FI4ko">matrix</a> whose associated <a href="/facts/Linear_complementarity_problem/eSKsgl38">linear complementarity problem</a> LCP(<i>M</i>,<i>q</i>) has a solution for every vector <i>q</i>. </p>