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Positive near-approximants and some problems of Halmos


Author: Richard Bouldin
Journal: Bull. Amer. Math. Soc. 80 (1974), 313-316
MSC (1970): Primary 47A55; Secondary 46B99
DOI: https://doi.org/10.1090/S0002-9904-1974-13479-8
MathSciNet review: 0331093
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References [Enhancements On Off] (What's this?)

  • 1. R. H. Bouldin, Positive approximants, Trans. Amer. Math. Soc. 177 (1973), 391-403. MR 317082
  • 2. R. H. Bouldin, Operators with a unique positive near-approximant, Indiana Univ. Math. J. (to appear). MR 326451
  • 3. R. H. Bouldin, The convex structure of the set of positive approximants for a given operator (to appear).
  • 4. R. G. Douglas, Banach algebra techniques in operator theory, Academic Press, New York, 1972. MR 361893
  • 5. P. R. Halmos, Positive approximants of operators, Indiana Univ. Math. J. 21 (1971/72), 951-960. MR 45 #919. MR 291829

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DOI: https://doi.org/10.1090/S0002-9904-1974-13479-8

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