A square matrix Av = (a ij) such that either all the elements a ij above the diagonal are 0 or all the elements below the diagonal are 0. The former is called a lower triangular matrix and the latter an upper triangular matrix.
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© 2001 Kluwer Academic Publishers
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Gass, S.I., Harris, C.M. (2001). Triangular matrix . In: Gass, S.I., Harris, C.M. (eds) Encyclopedia of Operations Research and Management Science. Springer, New York, NY. https://doi.org/10.1007/1-4020-0611-X_1070
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DOI: https://doi.org/10.1007/1-4020-0611-X_1070
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