淡江大學機構典藏:Item 987654321/41384
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    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/41384


    Title: Circularity of the numerical range
    Authors: Chien, Mao-Ting;Tam, Bit-Shun
    Contributors: 淡江大學數學學系
    Date: 1994-04
    Issue Date: 2013-06-13 11:24:57 (UTC+8)
    Publisher: Philadelphia: Elsevier Inc.
    Abstract: An equivalent condition on a 3-square complex or a 4-square real upper triangular matrix is found for its numerical range to be a circular disk centered at the origin. Sufficient conditions for the circularity of the numerical range of certain sparse matrices are also given in terms of graphs.
    Relation: Linear Algebra and Its Applications 201, pp.113-133
    DOI: 10.1016/0024-3795(94)90110-4
    Appears in Collections:[Graduate Institute & Department of Mathematics] Journal Article

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