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摘要
Let A and B be n x n positive definite matrices, Hartfiel obtained a lower bound for det (A + B). In this paper, we first extend his result to det (A + B + C), where A,B and C arc n x n positive definite matrices, and then show a generalization of this to the case of matrices whose numerical ranges are contained in a sector.
- 出版日期2018-10
- 单位上海大学
