On the existence of matrices with constrained elements,rows and columns |
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Authors: | E.Marques de Sá |
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Affiliation: | Instituto de Matem?tica Universidade de Coimbra Portugal |
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Abstract: | Let the following be given: two n × m real matrices, E and F, such that F ? E, three real n-rows, p, a and b, such that b ? a, and three real m-columns, t, c and d, such that d ? c. We give inequalities relating the given matrices and vectors, equivalent to the consistency of the system , , , where X is an n × m unknown real matrix. |
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