Kornejchuk, N. P.; Lushpaj, N. E. Best quadrature formulas for classes of differentiable functions and piecewise-polynomial approximation. (English) Zbl 0209.09802 Math. USSR, Izv. 3(1969), 1335-1355 (1971). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 2 Documents MSC: 41A55 Approximate quadratures 41A50 Best approximation, Chebyshev systems × Cite Format Result Cite Review PDF Full Text: DOI