A matrix that would be upper triangular except for having nonzero elements immediately below the main diagonal. Such matrices arise when trying to preserve sparsity in computing a matrix inverse. Matrices and matrix algebra.
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© 2001 Kluwer Academic Publishers
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Gass, S.I., Harris, C.M. (2001). Hessenberg 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_413
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DOI: https://doi.org/10.1007/1-4020-0611-X_413
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