Abstract
In this paper, we prove some inequalities for bounded positive operators on quaternionic Hilbert spaces. We follow the Kantorovich inequalities in operators inequalities in case of complex Hilbert spaces and obtain similar inequalities in the quaternionic setting. The results are applied to some operator version of Hölder-McCarthy inequalities and its reverse for positive quaternionic operators.
Similar content being viewed by others
References
Birkhoff, G., and J. von Neumann. 1936. The logic of quantum mechanics. Annals of Mathematics 37: 823–843.
Adler, S. 1995. Quaternionic quantum field theory. New York: Oxford University Press.
Colombo, F., J. Gantner, and D.P. Kimsey. 2018. Spectral theory on the S-spectrum for quaternionic operators 270. Cham: Birkhäuser.
Alpay, D., F. Colombo, J. Gantner, and I. Sabadini. 2015. A new resolvent equation for the S-functional calculus. Journal of Geometric Analysis 25: 1939–1968.
Colombo, F., and I. Sabadini. 2009. On some properties of the quaternionic functional calculus. Journal of Geometric Analysis 19 (3): 601–627.
Colombo, F., and I. Sabadini. 2010. On the formulations of the quaternionic functional calculus. Journal of Geometry and Physics 60 (10): 1490–1508.
Alpay, D., F. Colombo, and I. Sabadini. 2016. Slice hyperholomorphic schur analysis, operator theory: advances and applications, 256. Cham: Birkhäuser/Springer.
Alpay, D., F. Colombo, T. Qian, and I. Sabadini. 2016. The \(H^{\infty }\) functional calculus based on the \(S\)-spectrum for quaternionic operators and for n-tuples of noncommuting operators. Journal of Functional Analysis 271 (6): 1544–1584.
Colombo, F., and J. Gantner. 2018. Fractional powers of quaternionic operators and Kato’s formula using slice hyperholomorphicity. Transactions of the American Mathematical Society 370 (2): 1045–1100.
Colombo, F., and J. Gantner. 2018. An application of the S-functional calculus to fractional diffusion processes. Milan Journal of Mathematics 86 (2): 225–303.
Alpay, D., F. Colombo, and D.P. Kimsey. 2016. The spectral theorem for quaternionic unbounded normal operators based on the \(S\)-spectrum. Journal of Mathematical Physics 57 (2): 023503.
Colombo, F., and J. Gantner. 2019. Quaternionic closed operators, fractional powers and fractional diffusion processes. Operator theory: advances and applications, 274. Cham: Birkhäuser/Springer.
Cerejeiras, P., F. Colombo, U. Kähler, and I. Sabadini. 2019. Perturbation of normal quaternionic operators. Transactions of the American Mathematical Society 372 (5): 3257–3281.
Alpay, D., F. Colombo, and I. Sabadini. 2020. Quaternionic de Branges spaces and characteristic operator function. SpringerBriefs in mathematics. Cham: Springer.
Colombo, F., and D.P. Kimsey. 2022. The spectral theorem for normal operators on a Clifford module. Analysis and Mathematical Physics 12 (1): Paper No. 25, 92 25.
Colombo, F., I. Sabadini, and D.C. Struppa. 2011. Noncommutative functional calculus. Theory and applications of slice regular functions. Basel: Birkhäuser.
Colombo, F., J. Gantner, and S. Pinton. 2021. An introduction to hyperholomorphic spectral theories and fractional powers of vector operators. Advances in Applied Clifford Algebras 31 (3): Paper No. 45.
Greub, W., and W. Rheinboldt. 1959. On a generalization of an inequality of L.V. Kantorovich. Proceedings of the American Mathematical Society 10: 407–415.
Lin, C.T. 1984. Extrema of quadratic forms and statistical applications. Communications in Statistics A 13 (12): 1517–1520.
Liu, S., and H. Neudecker. 1997. Kantorovich inequalities and efficiency comparisons for several classes of estimators in linear models. Statistica Neerlandica 51 (3): 345–355.
Galantai, A. 2001. A study of Auchmuty’s error estimate. Computers & Mathematics with Applications 42 (8–9): 1093–1102.
Robinson, P.D., and A.J. Wathen. 1992. Variational bounds on the entries of the inverse of a matrix. IMA Journal of Numerical Analysis 12 (4): 463–486.
Ghiloni, R., V. Moretti, and A. Perotti. 2013. Continuous slice functional calculus in quaternionic Hilbert spaces. Reviews in Mathematical Physics 25: 1350006.
Fujii, M., J. Mićić Hot, J. Pečarić, and Y. Seo. 2012. Recent developments of Mond-Pečarić method in operator inequalities. Inequalities for bounded selfadjoint operators on a Hilbert space II. Monographs in inequalities 4. Zagreb: Element.
Helmberg, G. 1969. Introduction to spectral theory in Hilbert space. New York: Wiley.
Pečarić, J., T. Furuta, J. Mićić Hot, and Y. Seo. 2013. Mond-Pečarić method in operator inequalities, Monographs in inequalities 1. Zagreb: Element.
Mahdipour, S., A. Niknam, and M. Fashandi. 2019. Some inequalities for selfadjoint operators on quaternionic Hilbert spaces. Advances in Applied Clifford Algebras 30: 5.
Acknowledgements
The authors thank the reviewers for the insightful suggestions which have helped to improve the paper. The research of the second author is supported by partly by University of Delhi.
Author information
Authors and Affiliations
Corresponding author
Additional information
Communicated by S. Ponnusamy.
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
About this article
Cite this article
Dharmarha, P., Ramkishan Kantorovich inequality for positive operators on quaternionic Hilbert spaces. J Anal 32, 993–1007 (2024). https://doi.org/10.1007/s41478-023-00664-6
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s41478-023-00664-6