| 苏兆龙.E1类中多项式和有理函数的最佳逼近[J].数学研究及应用,1982,2(3):41~50 |
| E1类中多项式和有理函数的最佳逼近 |
| On the Best Approximation in E1 Space of Functions by Polynomials and Rational Functions |
| 投稿时间：1981-06-01 |
| DOI：10.3770/j.issn:1000-341X.1982.03.010 |
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| In this paper we obtain some estimations of the degree of the best approximation in E1 space of functions by polynomials and rational functions with preas-signed poles, in which D is an Альпер region, its boundary p satisfies the condition ∫0(j(u))/u|lnu|du<∞, where j(u) is the continuous modulus of the angle between the tangent of Γ and the positive real axis as the function of the arc length of Γ. |
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