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Articles

On joint numerical radius II

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Pages 1197-1204 | Received 05 Mar 2013, Accepted 10 Jun 2013, Published online: 10 Sep 2013

References

  • Müller V. On joint numerical radius, Proc. Amer. Math. Soc. in press.
  • Müller V. Spectral theory of linear operators, operator theory, advances and applications. Basel: Birkhäuser; 2007.
  • Bang T. A solution of the ‘plank problem’. Proc. Amer. Math. Soc. 1951;2:990–993.
  • Li CK, Poon YT. The joint essential numerical range of operators: convexity and related results. Studia Math. 2009;194:91–104.
  • Bonsall FF, Duncan J. Numerical ranges of operators on normed spaces and of elements of normed algebras. London Mathematical Society Lecture Note Series, 2. London: Cambridge University Press; 1971.
  • Popescu G. Unitary invariants in multivariable operator theory. Mem. Amer. Math. Soc. 2009;200:941.

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