共查询到17条相似文献,搜索用时 93 毫秒
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陈天平 《数学年刊A辑(中文版)》1994,(4)
设G(z)在|z|<ρ(ρ>1)中解析,且数据Re[G(ej2kπ/n)];k=0,1,…,n-1已给出,其中n=2ν+1,本文构造了一个ν次多项式Pν(z)满足插值条件Re[Pν(ej2kπ/n)]=Re[G(ej2kπ/n)],k=0,1,…,n-1.并估计了误差‖G(ejω)-Pν(ejω)‖.此外,还给出了一个Walsh类型的超收敛定理. 相似文献
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利用推广到二元实函数上的微分中值定理,将实数域上的微分中值定理推广到复数域上,可得到利用导数研究解析函数性质的工具,即关于解析函数的微分中值定理. 相似文献
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给出了广义Vandermonde行列式的一种求法,并运用它给出了Lagrange插值公式的几个证明. 相似文献
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给出了一个积分型Cauchy中值定理的推广,并讨论了连续函数的积分型Cauchy中值定理的逆问题. 相似文献
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In this paper, we consider the Straight Line Type Node Configuration C (SLTNCC) in multivariate polynomial interpolation as the result of different kinds of transformations of lines (such as parallel translations, rotations). Corresponding to these transformations we define different kinds of interpolation problems for the SLTNCC. The expression of the confluent multivariate Vandermonde determinant of the coefficient matrix for each of these interpolation problems is obtained, and from this expression we conclude the related interpolation problem is unisolvent. Also, we give a kind of generalization of the SLTNCC in Section 5. As well, we obtain an expression of the interpolating polynomial for a kind of interpolation problem discussed in this paper. 相似文献
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We obtain new upper bounds for the number of integral solutionsof a complete system of symmetric equations, which may be viewedas a multi-dimensional version of the system considered in Vinogradov'smean value theorem. We then use these bounds to obtain Weyl-typeestimates for an associated exponential sum in several variables.Finally, we apply the HardyLittlewood method to obtainasymptotic formulas for the number of solutions of the Vinogradov-typesystem and also of a related system connected to the problemof finding linear spaces on hypersurfaces. 2000 MathematicsSubject Classification 11D45, 11D72, 11L07, 11P55. 相似文献
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将C auchy中值定理的条件进行适当减弱,得到了广义C auchy中值定理,从而推广了C auchy中值定理,并在凸函数的条件下,证明了其逆定理亦成立. 相似文献
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