Let Fin be the set of finite functions defined on initial segments of o), The length problem is stated as follows: "Characterize the sets L E cc) which satisfy R, u Fin@) r.e." [9]. It growed out of the work of W. MENZEL and V. SPERSCHNEIDER on r.e. extensions of R, by finite functions [a], [9J If
The Adaption Problem for Nonsymmetric Convex Sets
โ Scribed by E. Novak
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 329 KB
- Volume
- 82
- Category
- Article
- ISSN
- 0021-9045
No coin nor oath required. For personal study only.
โฆ Synopsis
We study the problem of optimal recovery in the case of a nonsymmetric convex class of functions. We compare adaptive and nonadaptive methods and prove a bound on how much better adaptive methods can be. We use new inequalities between Gelfand widths and Bernstein widths and new relations between these widths and optimal error bounds for adaptive and nonadaptive methods, respectively. 1995 Academic Press, Inc.
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