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Approximation with restricted spectra

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References

  1. Ando, T., Sekiguchi, T., Suzuki, T.: Approximation by positive operators. Math. Z.131, 273–282 (1973)

    Google Scholar 

  2. Berberian, S.K.: Approximate proper vectors. Proc. Amer. math. Soc.13, 111–114 (1962)

    Google Scholar 

  3. Bouldin, R.: Positive Approximants. Trans. Amer. math. Soc.177, 391–403 (1973)

    Google Scholar 

  4. Fan, K., Hoffman, A.J.: Some metric inequalities in the space of matrices. Proc. Amer. math. Soc.6, 111–116 (1955)

    Google Scholar 

  5. Halmos, P.R.: Positive approximants of operators. Indiana Univ. Math. J.21, 951–960 (1972)

    Google Scholar 

  6. Halmos, P.R.: Spectral approximants of normal operators. Proc. Edinburgh math. Soc., II. Ser.19, 51–58 (1974)

    Google Scholar 

  7. Legg, D.A., Scranton, B.E., Ward, J.D.: Chebyshev subspaces in the space of compact operators. J. Approximation Theory (to appear)

  8. Olsen, C.L.: Extreme points and finite rank operators in the set of compact approximants. Indiana Univ. Math. J.24, 409–416 (1974)

    Google Scholar 

  9. Singer, I.: Best Approximation in Normed Linear Spaces. Berlin-Heidelberg-New York: Springer 1970

    Google Scholar 

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Authors and Affiliations

  1. Department of Mathematics, Texas A & M University, 77843, College Station, Texas, USA

    Charles K. Chui, Philip W. Smith & Joseph D. Ward

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  1. Charles K. Chui
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  2. Philip W. Smith
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  3. Joseph D. Ward
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Chui, C.K., Smith, P.W. & Ward, J.D. Approximation with restricted spectra. Math Z 144, 289–297 (1975). https://doi.org/10.1007/BF01214143

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