JournalsjstVol. 3, No. 1pp. 83–100

The Tan 2Θ\Theta Theorem for indefinite quadratic forms

  • Luka Grubišić

    University of Zagreb, Croatia
  • Vadim Kostrykin

    Johannes Gutenberg-Universität Mainz, Germany
  • Konstantin A. Makarov

    University of Missouri, Columbia, USA
  • Krešimir Veselić

    FernUniversität Hagen, Germany
The Tan 2$\Theta$ Theorem for indefinite quadratic forms cover
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Abstract

A version of the Davis–Kahan Tan 2Θ\Theta 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 2Θ\Theta Theorem for indefinite quadratic forms. J. Spectr. Theory 3 (2013), no. 1, pp. 83–100

DOI 10.4171/JST/38