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Almost strictly sign regular rectangular matrices
P. Alonso, J. M. Peña, M. L. Serrano · 2024-02-02 · via math.CO updates on arXiv.org

Almost strictly sign regular matrices are sign regular matrices with a special zero pattern and whose nontrivial minors are nonzero. In this paper we provide several properties of almost strictly sign regular rectangular matrices and analyze their QR factorization.

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