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A note on logarithms of normal operators

Author: Svetozar Kurepa
Journal: Proc. Amer. Math. Soc. 13 (1962), 307-311
MSC: Primary 47.30
MathSciNet review: 0133687
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References [Enhancements On Off] (What's this?)

  • [1] P. R. Halmos, Introduction to Hilbert space and the theory of spectral multiplicities, Chelsea, New York, 1951.
  • [2] E. Hille, On roots and logarithms of elements of a complex Banach algebra, Math. Ann. 136 (1958), 46-57. MR 0096137 (20:2632)
  • [3] G. L. Krabbe, On the logarithm of a uniformly bounded operator, Trans. Amer. Math. Soc. 81 (1956), 155-166. MR 0075557 (17:768d)
  • [4] C. R. Putnam, On square roots and logarithms of self-adjoint operators, Proc. Glasgow Math. Assoc. 4 (1958), 1-2. MR 0121654 (22:12388)
  • [5] B. Sz. Nagy, On uniformly bounded linear transformations in Hilbert space, Acta Sci. Math. Szeged 11 (1947), 152-157. MR 0022309 (9:191b)

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