Geodesic
Multivariate Iyengar type inequalities for radial functions
Problemy analiza, Tome 8 (2019) no. 2, pp. 3-27 Cet article a éte moissonné depuis la source Math-Net.Ru

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Here we present a variety of multivariate Iyengar type inequalities for radial functions defined on the shell and ball. Our approach is based on the polar coordinates in $\mathbb{R}^{N}$, $N\geq 2$, and the related multivariate polar integration formula. Via this method we transfer well-known univariate Iyengar type inequalities and univariate author's related results into multivariate Iyengar inequalities.
Keywords: Iyengar inequality, Polar coordinates, radial function, Shell, Ball. 
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George A. Anastassiou. Multivariate Iyengar type inequalities for radial functions. Problemy analiza, Tome 8 (2019) no. 2, pp. 3-27. http://geodesic.mathdoc.fr/item/PA_2019_8_2_a0/

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