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Linear conditions for positive determinants

by: J. M. Carnicer, T. N. T. Goodman, J. M. Peña
Linear Algebra and its Applications, Vol. 292, No. 1-3. (May 1999), pp. 39-59, doi:10.1016/s0024-3795(99)00011-7  Key: citeulike:11425728

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Abstract

Weakest linear conditions on the rows of a square matrix of arbitrary dimension to ensure that its determinant is positive are described and analyzed. In addition to strict diagonal dominance by rows with positive diagonal elements, we find a new weakest set of conditions: the row mean being positive and larger than all the off-diagonal entries in that row. A complete classification is provided for 3×3 matrices.


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