高美平
(文山學(xué)院 數(shù)學(xué)學(xué)院, 云南 文山 663000)
關(guān)于M-矩陣最小特征值下界的兩個不等式
高美平
(文山學(xué)院 數(shù)學(xué)學(xué)院, 云南 文山 663000)
文章在A,B是非奇M-矩陣的條件下,給出了B與A-1的Hadamard積的最小特征值τ的一個下界。另外,還得到了非奇M-矩陣A與其逆A-1的Hadamard積的最小特征值的一個下界。
M-矩陣;最小特征值;下界;不等式
因?yàn)镸-矩陣有重要的應(yīng)用背景,所以M-矩陣特征值的下界也受到不少學(xué)者的廣泛關(guān)注[1-4]。設(shè)A, B是n階非奇M-矩陣,用表示B與A-1的Hadamard積的最小特征值。本文繼續(xù)對的下界問題進(jìn)行研究。
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[6] R. A. Brualdi, S. Mellendorf. Regions in the Complex Plane Containing the Eigenvalues of a Matrix[J]. American Mathematical Monthly,1994,101:975-985.
[7] 高美平.M-矩陣與其逆的Hadamard積的最小特征值下界新的估計(jì)式[J].四川師范大學(xué)學(xué)報(bào):自然科學(xué)版,2014 (1):90-97.
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Two Inequalities for the Lower Bound of the Minimum Eigen Value of an M-Matrix
GAO Mei-ping
(School of Mathematics, Wenshan University, Wenshan 663000, China)
If A and B are nonsingular M-matrices, a lower bound on the minimum eigenbaluefor the Hadamard product of B and A-is given. In addition, a lower bound of the minimum eigenvalue τof an M-matrix A and its inverse A-is derived.
M-matrix; minimum eigenvalue; lower bound; inequalities
O151.21
A
1674-9200(2014)03-0040-05
(責(zé)任編輯 劉常福)
2014-03-18
云南省教育廳科研基金項(xiàng)目“M-矩陣與其逆的Hadamard積的特征值下界估計(jì)”(2012Y270);文山學(xué)院重點(diǎn)學(xué)科“數(shù)學(xué)”建設(shè)項(xiàng)目(12WSXK01)。
高美平(1977-),女,白族,云南鶴慶人,文山學(xué)院數(shù)學(xué)學(xué)院講師,碩士,主要從事矩陣?yán)碚摷捌鋺?yīng)用研究。