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In mathematics, a -matrix is a complex square matrix with every principal minor > 0. A closely related class is that of -matrices, which are the closure of the class of -matrices, with every principal minor 0. == Spectra of -matrices == By a theorem of Kellogg, the eigenvalues of - and - matrices are bounded away from a wedge about the negative real axis as follows: :If are the eigenvalues of an -dimensional -matrix, then :: :If , , are the eigenvalues of an -dimensional -matrix, then :: 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「P-matrix」の詳細全文を読む スポンサード リンク
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