*[160] B. SENDov, Certain questions in the theory of approximations of functions and sets in the Hausdorff metric, Uspehi Mat. Nauk, 24, 5(149) (1969), pp. 141–178. (In Russian.) , Approximation relative to Hausdorff distance, ...*

**Author**: Ivan Singer

**Publisher:** SIAM

**ISBN:** 9780898710106

**Category:** Mathematics

**Page:** 95

**View:** 214

*The complex rational functions, в}(c), are defined similarly with "m and "n replaced with P}(c) and Рp (Ф), the polynomials with complex coefficients. А сопр1ex function defined on [ 0, 1) still has exactly one best approximation from ...*

**Author**:

**Publisher:** Elsevier

**ISBN:** 0080871461

**Category:** Mathematics

**Page:** 448

**View:** 524

*... the Academy of the Socialist Republic of Romania, Bucharest; Springer-Verlag, New York-Berlin 1970. , The theory of best approximation and functional analysis, C. B. M. S. Regional Conference Series in Applied Mathematics, No. 13.*

**Author**: Stefan Cobzas

**Publisher:** Springer Science & Business Media

**ISBN:** 9783034804783

**Category:** Mathematics

**Page:** 219

**View:** 887

*Detailed proofs of results are given, along with varied illustrations. While many of the results have been published in mathematical journals, this is the first time these results appear in book form.*

**Author**: Ivan Singer

**Publisher:** Springer Science & Business Media

**ISBN:** 9780387283951

**Category:** Mathematics

**Page:** 356

**View:** 599

*[3] Chebyshev sets and the shapes of convex bodies, in Methods of Functional Analysis in Approximation Theory (edited by C. A. Micchelli, D. V. Pai, and B. V. Limaye), Birkhäuser Verlag, Boston, 1986, 97–121.*

**Author**: Frank R. Deutsch

**Publisher:** Springer Science & Business Media

**ISBN:** 9781468492989

**Category:** Mathematics

**Page:** 338

**View:** 155

*I. Singer Introduction Here we want to present briefly some results, problems and directions of research in the modern theory of best approximation, i.e. in which the methods of functional analysis are applied in a consequent manner.*

**Author**: Giuseppe Geymonat

**Publisher:** Springer Science & Business Media

**ISBN:** 9783642109843

**Category:** Mathematics

**Page:** 854

**View:** 699

*T.J. Rivlin and R.J. Sibner, The degree of approzimation of certain functions of two variables by the sum of functions of ... I. Singer, “The Theory of Best Approximation and Functional Analysis,” Society for Industrial and Appl. Math., ...*

**Author**: William A. Light

**Publisher:** Springer

**ISBN:** 9783540397410

**Category:** Mathematics

**Page:** 158

**View:** 189