QUADRATIC WEIGHTED GEOMETRIC MEAN IN HERMITIAN UNITAL BANACH ∗–ALGEBRAS
QUADRATIC WEIGHTED GEOMETRIC MEAN IN HERMITIAN UNITAL BANACH ∗–ALGEBRAS
复制标题
埃尔米特单位巴纳赫*–代数中的二次加权几何平均值
DOI:
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发表时间:
2018
期刊:
影响因子:
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通讯作者:
F. Bonsall
中科院分区:
文献类型:
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作者:
S. Dragomir;F. Bonsall
In this paper we introduce the quadratic weighted geometric mean x ν y := ∣ ∣ ∣ ∣ ∣yx−1 ∣ ∣ ν x ∣ ∣ ∣ 2 for invertible elements x, y in a Hermitian unital Banach ∗ -algebra and real number ν . We show that x ν y = |x| ν |y| , where ν is the usual geometric mean and provide some inequalities for this mean under various assumptions for the elements involved. Mathematics subject classification (2010): 47A63, 47A30, 15A60, 26D15, 26D10.