Best approximation of unbounded operators by bounded ones
type: Item
instance of: scholarly article
title: Best approximation of unbounded operators by bounded ones
zbMATH Open document ID: 0856.41018
author: V. N. Gabushin
author: Vitalii Arestov
published in: Russian Mathematics
publication date: 1997-03-03T00:00:00Z
review text: This is a survey on best approximation of unbounded operators by bounded ones with 127 items in the references, including: 1. Relation of the Stechkin problem with other extremal problems; 2. Existence of best approximating operators and their properties; 3. Optimal approximation of functionals; 4. The best approximation of operators of differentiation and inequalities between norms of derivatives; 5. Approximation of invariant operators.
reviewed by: Yingguang Shi
Mathematics Subject Classification ID: 41A35
Mathematics Subject Classification ID: 41A50
zbMATH DE Number: 923052
zbMATH Keywords: approximation by operators
zbMATH Keywords: unbounded operators
zbMATH Keywords: best approximating
MaRDI profile type: Publication
description: scientific article; zbMATH DE number 923052