Journal of the Mathematical Society of Japan
- J. Math. Soc. Japan
- Volume 68, Number 2 (2016), 711-735.
Some remarks on cubature formulas with linear operators
In this paper we consider a novel type of cubature formulas called operator-type cubature formulas. The notion originally goes back to a famous work by G. D. Birkhoff in 1906 on Hermite interpolation problem. A well-known theorem by Sobolev in 1962 on invariant cubature formulas is generalized to operator-type cubature, which provides a systematic treatment of Lebedev's works in the 1970s and some related results by Shamsiev in 2006. We give a lower bound for the number of points needed, and discuss analytic conditions for equality, together with tight illustrations for Laplacian-type cubature.
J. Math. Soc. Japan, Volume 68, Number 2 (2016), 711-735.
First available in Project Euclid: 15 April 2016
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HIRAO, Masatake; OKUDA, Takayuki; SAWA, Masanori. Some remarks on cubature formulas with linear operators. J. Math. Soc. Japan 68 (2016), no. 2, 711--735. doi:10.2969/jmsj/06820711. https://projecteuclid.org/euclid.jmsj/1460727377