Research Article

Edwards' Theorem and matrix-valued functions

Volume: 54 Number: 4 August 29, 2025
EN

Edwards' Theorem and matrix-valued functions

Abstract

We extend several notions such as semi-continuity and Jensen measures for matrix-valued functions. For that purpose, we introduce $\Gamma$-order on noncommutative matrix spaces. Afterward, we generalize the Edwards' Theorem for a noncommutative matrix space by exploiting properties of $\Gamma$-order given on the matrix space which we consider.

Keywords

Supporting Institution

TUBITAK

Project Number

123F356

Ethical Statement

The authors have no competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

References

  1. [1] C. D. Aliprantis and O. Burkinshaw, Positive Operators, Springer, 2006.
  2. [2] R. R. Coifman and S. Semmes, Interpolation of Banach Spaces, Perron Processes, and Yang-Mills, Am. J. Math. 115 (2), 243278, 1993.
  3. [3] J. B. Conway, A course in Functional Analysis, Springer, 1997.
  4. [4] N. Dinculeanu, Vector Measures, Pergamon Press, 1967.
  5. [5] D.A. Edwards, Choquet boundary theory for certain spaces of lower semicontinuous functions, in Function Algebras (Proc. Internat. Sympos. on Function Algebras, Tulane Univ., 1965 (Birtel, F., ed.)), 300-309, Scott-Foresman, Chicago, Ill., 1966.
  6. [6] T.W. Gamelin, Uniform Algebras and Jensen Measures, London Mathematical Society Lecture Notes Series 32, Cambridge University Press, Cambridge, 1978.
  7. [7] L. Lempert, Noncommutative Potential Theory, Analysis Math. 28 (4), 603-627, 2017.
  8. [8] M. P. Olson, The selfadjoint operators of a Von Neumann algebra form a conditionally complete lattice, Proc. Amer. Soc. 28, 537-544, 1971.

Details

Primary Language

English

Subjects

Real and Complex Functions (Incl. Several Variables)

Journal Section

Research Article

Early Pub Date

January 27, 2025

Publication Date

August 29, 2025

Submission Date

May 3, 2024

Acceptance Date

December 12, 2024

Published in Issue

Year 2025 Volume: 54 Number: 4

APA
Erdur, U., & Göğüş, N. G. (2025). Edwards’ Theorem and matrix-valued functions. Hacettepe Journal of Mathematics and Statistics, 54(4), 1442-1457. https://doi.org/10.15672/hujms.1478167
AMA
1.Erdur U, Göğüş NG. Edwards’ Theorem and matrix-valued functions. Hacettepe Journal of Mathematics and Statistics. 2025;54(4):1442-1457. doi:10.15672/hujms.1478167
Chicago
Erdur, Umutcan, and Nihat Gökhan Göğüş. 2025. “Edwards’ Theorem and Matrix-Valued Functions”. Hacettepe Journal of Mathematics and Statistics 54 (4): 1442-57. https://doi.org/10.15672/hujms.1478167.
EndNote
Erdur U, Göğüş NG (August 1, 2025) Edwards’ Theorem and matrix-valued functions. Hacettepe Journal of Mathematics and Statistics 54 4 1442–1457.
IEEE
[1]U. Erdur and N. G. Göğüş, “Edwards’ Theorem and matrix-valued functions”, Hacettepe Journal of Mathematics and Statistics, vol. 54, no. 4, pp. 1442–1457, Aug. 2025, doi: 10.15672/hujms.1478167.
ISNAD
Erdur, Umutcan - Göğüş, Nihat Gökhan. “Edwards’ Theorem and Matrix-Valued Functions”. Hacettepe Journal of Mathematics and Statistics 54/4 (August 1, 2025): 1442-1457. https://doi.org/10.15672/hujms.1478167.
JAMA
1.Erdur U, Göğüş NG. Edwards’ Theorem and matrix-valued functions. Hacettepe Journal of Mathematics and Statistics. 2025;54:1442–1457.
MLA
Erdur, Umutcan, and Nihat Gökhan Göğüş. “Edwards’ Theorem and Matrix-Valued Functions”. Hacettepe Journal of Mathematics and Statistics, vol. 54, no. 4, Aug. 2025, pp. 1442-57, doi:10.15672/hujms.1478167.
Vancouver
1.Umutcan Erdur, Nihat Gökhan Göğüş. Edwards’ Theorem and matrix-valued functions. Hacettepe Journal of Mathematics and Statistics. 2025 Aug. 1;54(4):1442-57. doi:10.15672/hujms.1478167