Banach Journal of Mathematical Analysis

Interpolation classes and matrix means

Toan M. Ho, Dinh Trung Hoa, and Hiroyuki Osaka

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Abstract

Using a `local' integral representation of a matrix connection of order $n$ corresponding to an interpolation function of the same order, for each integer $n$, we can describe an injective map from the class of matrix connections of order $n$ to the class of positive $n$-monotone functions on $(0,\infty)$ and the range of this corresponding covers the class of interpolation functions of order $2n$. In particular, the space of symmetric connections is isomorphic to the space of symmetric positive $n$-monotone functions. Moreover, we show that, for each $n$, the class of $n$-connections extremely contains that of $(n+2)$-connections.

Article information

Source
Banach J. Math. Anal., Volume 9, Number 3 (2015), 140-152.

Dates
First available in Project Euclid: 19 December 2014

Permanent link to this document
https://projecteuclid.org/euclid.bjma/1419001708

Digital Object Identifier
doi:10.15352/bjma/09-3-10

Mathematical Reviews number (MathSciNet)
MR3296130

Zentralblatt MATH identifier
1316.15037

Subjects
Primary: 46L30: States
Secondary: 15A45: Miscellaneous inequalities involving matrices

Keywords
Interpolation functions matrix monotone functions mean of positive matrices

Citation

Hoa, Dinh Trung; Ho, Toan M.; Osaka, Hiroyuki. Interpolation classes and matrix means. Banach J. Math. Anal. 9 (2015), no. 3, 140--152. doi:10.15352/bjma/09-3-10. https://projecteuclid.org/euclid.bjma/1419001708


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