S-orthogonality and construction of Gauss-Turán-type quadrature formulae
✍ Scribed by Walter Gautschi; Gradimir V. Milovanovic
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 599 KB
- Volume
- 86
- Category
- Article
- ISSN
- 0377-0427
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✦ Synopsis
Using the theory of s-orthogonality and reinterpreting it in terms of the standard orthogonal polynomials on the real line, we develop a method for constructing Gauss-Turfin-type quadrature formulae. The determination of nodes and weights is very stable. For finding all weights, our method uses an upper triangular system of linear equations for the weights associated with each node. Numerical examples are included.
📜 SIMILAR VOLUMES
In this paper, which is connected with the work of Ma, Rokhlin and Wandzura [1], a numerical scheme for the construction of generalized Gauss-Turin quadrature, replacing the polynomials with functions from a rather wide class, is presented. In a special case, this construction reduces itself to the
The L m extremal polynomials in an explicit form with respect to the weights (1&x) &1Â2 (1+x) (m&1)Â2 and (1&x) (m&1)Â2 (1+x) &1Â2 for even m are given. Also, an explicit representation for the Cotes numbers of the corresponding Tura n quadrature formulas and their asymptotic behavior is provided. 1
For \(f \in C[-1,1]\) denote by \(B\_{n, p}(f)\) its best \(L\_{n}\)-approximant by polynomials of degree at most \(n(1 \leqslant p \leqslant \infty)\). The following statement is the main result of the paper: Let \(1 1\). 1993 Academic Press, Inc.