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Inverse functions of polynomials and orthogonal polynomials as operator monotone functions
Author(s):
Mitsuru
Uchiyama
Journal:
Trans. Amer. Math. Soc.
355
(2003),
4111-4123.
MSC (2000):
Primary 47A63, 15A48;
Secondary 33C45, 30B40
Posted:
June 10, 2003
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Abstract:
We study the operator monotonicity of the inverse of every polynomial with a positive leading coefficient. Let be a sequence of orthonormal polynomials and the restriction of to , where is the maximum zero of . Then and the composite are operator monotone on . Furthermore, for every polynomial with a positive leading coefficient there is a real number so that the inverse function of defined on is semi-operator monotone, that is, for matrices , implies
References:
- 1.
- R. Bhatia, Matrix Analysis, Graduate Texts in Mathematics 169, Springer-Verlag, New York, 1997. MR 98i:15003
- 2.
- W. Donoghue, Monotone matrix functions and analytic continuation, Grundlehren der mathematischen Wissenschaften 207, Springer-Verlag, New York and Heidelberg, 1974. MR 58:6279
- 3.
- P. Borwein and T. Erdelyi, Polynomials and polynomial inequalities, Graduate Texts in Mathematics 161, Springer-Verlag, New York, 1995. MR 97e:41001
- 4.
- F. Hansen and G. K. Pedersen, Jensen's inequality for operators and Löwner's theorem, Math. Ann. 258 (1982), 229-241. MR 83g:47020
- 5.
- R. Horn and C. Johnson, Topics in matrix analysis, Cambridge Univ. Press, 1991. MR 92e:15003
- 6.
- A. Koranyi, On a theorem of Löwner and its connections with resolvents of selfadjoint transformations, Acta Sci. Math. Szeged 17 (1956), 63-70. MR 18:588c
- 7.
- K. Löwner, Über monotone Matrixfunktionen, Math. Z. 38 (1934), 177-216.
- 8.
- M. Rosenblum and J. Rovnyak, Hardy classes and operator theory, Oxford Mathematical Monographs, The Clarendon Press, Oxford University Press, 1985. MR 87e:47001
- 9.
- M. Uchiyama, Operator monotone functions which are defined implicitly and operator inequalities, J. Funct. Anal. 175 (2000), 330-347. MR 2001h:47021
- 10.
- M. Uchiyama and M. Hasumi, On some operator monotone functions, Integral Equations Operator Theory 42 (2002), 243-251. MR 2002k:47044
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Additional Information:
Mitsuru
Uchiyama
Affiliation:
Department of Mathematics, Fukuoka University of Education, Munakata, Fukuoka, 811-4192, Japan
Email:
uchiyama@fukuoka-edu.ac.jp
DOI:
10.1090/S0002-9947-03-03355-5
PII:
S 0002-9947(03)03355-5
Keywords:
Positive semi-definite operator,
operator monotone function,
orthogonal polynomials
Received by editor(s):
October 16, 2002
Posted:
June 10, 2003
Copyright of article:
Copyright
2003,
American Mathematical Society
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