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Mathematics of Computation
Mathematics of Computation
ISSN 1088-6842(online) ISSN 0025-5718(print)

 

On Gauss-Kronrod quadrature formulae of Chebyshev type


Author: Sotirios E. Notaris
Journal: Math. Comp. 58 (1992), 745-753
MSC: Primary 65D32; Secondary 33C45
MathSciNet review: 1122074
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Abstract: We prove that there is no positive measure $ d\sigma $ on (a, b) such that the corresponding Gauss-Kronrod quadrature formula is also a Chebyshev quadrature formula. The same is true if we consider measures of the form $ d\sigma (t) = \omega (t)dt$, where $ \omega (t)$ is even, on a symmetric interval $ ( - a,a)$, and the Gauss-Kronrod formula is required to have equal weights only for n even. We also show that the only positive and even measure $ d\sigma (t) = d\sigma ( - t)$ on $ ( - 1,1)$ for which the Gauss-Kronrod formula has all weights equal if $ n = 1$, or has the form $ \smallint _{ - 1}^1f(t)d\sigma (t) = w\Sigma _{\nu = 1}^nf({\tau _\nu }) + {w_1}f(1) + w\Sigma _{\mu = 2}^nf(\tau _\mu ^\ast) + {w_1}f( - 1) + R_n^K(f)$ for all $ n \geq 2$, is the Chebyshev measure of the first kind $ d{\sigma _C}(t) = {(1 - {t^2})^{ - 1/2}}dt$.


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Additional Information

DOI: http://dx.doi.org/10.1090/S0025-5718-1992-1122074-9
PII: S 0025-5718(1992)1122074-9
Keywords: Gauss-Kronrod quadrature formulae, Chebyshev quadrature
Article copyright: © Copyright 1992 American Mathematical Society