The Tan 2 Theorem for indefinite quadratic forms
Luka Grubišić
University of Zagreb, CroatiaVadim Kostrykin
Johannes Gutenberg-Universität Mainz, GermanyKonstantin A. Makarov
University of Missouri, Columbia, USAKrešimir Veselić
FernUniversität Hagen, Germany
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Abstract
A version of the Davis–Kahan Tan 2 theorem [3] for not necessarily semibounded linear operators defined by quadratic forms is proven. This theorem generalizes a result by Motovilov and Selin [13].
Cite this article
Luka Grubišić, Vadim Kostrykin, Konstantin A. Makarov, Krešimir Veselić, The Tan 2 Theorem for indefinite quadratic forms. J. Spectr. Theory 3 (2013), no. 1, pp. 83–100
DOI 10.4171/JST/38