Geodesic
Best Hausdorff approximations by algebraic polynomials and porosity
Matematičeskie zametki, Tome 59 (1996) no. 5, pp. 692-702 Cet article a éte moissonné depuis la source Math-Net.Ru

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For any $b\in(a,a')$, a sharp lower bound for the coefficient of $v$-uniformity of the set of discontinuity points of a function $f$ on the interval $(-b,b)$ is obtained. 
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     author = {A. I. Ermakov},
     title = {Best {Hausdorff} approximations by algebraic polynomials and porosity},
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     year = {1996},
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     url = {http://geodesic.mathdoc.fr/item/MZM_1996_59_5_a4/}
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A. I. Ermakov. Best Hausdorff approximations by algebraic polynomials and porosity. Matematičeskie zametki, Tome 59 (1996) no. 5, pp. 692-702. http://geodesic.mathdoc.fr/item/MZM_1996_59_5_a4/

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