Abstract
The authors use a recent characterization of the numerical range to obtain several conditions for a symmetric tridiagonal matrix with positive diagonal entries to be positive definite.
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APA
Chien, M. T., & Neumann, M. (1998). Positive definiteness of tridiagonal matrices via the numerical range. Electronic Journal of Linear Algebra, 3, 93–102. https://doi.org/10.13001/1081-3810.1016
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