We’re sorry, something doesn't seem to be working properly.
Please try refreshing the page. If that doesn't work, please contact support so we can address the problem.
References
K. E. Gustafson, D. K. M. Rao, Numerical Range, Springer-Verlag, New York, 1997.
M. Kreĭn, Angular localization of the spectrum of a multiplicative integral in a Hilbert space, Funct. Anal. Appl. 3 (1969), 89–90.
B. Wang, F. Zhang, A trace inequality for unitary matrices, Amer. Math. Monthly 101 (1994), 453–455.
F. Zhang, Matrix Theory: Basic Results and Techniques, Springer-Verlag, New York, 2011.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Lin, M. Remarks on Kreĭn’s Inequality. Math Intelligencer 34, 3–4 (2012). https://doi.org/10.1007/s00283-011-9270-z
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00283-011-9270-z