本文证明了多维卷积算子逼近的逆定理。
This paper investigates the converse theorems for the multidimensional convolution operator approximation.
稳定逆定理在非线性奇异系统中有着非常重要的应用。
The application of inversion theory to nonlinear singular systems is an important problem.
利用光滑模和K -泛函给出了一类多元三角多项式算子同时逼近的正逆定理。
Using the modulus of smoothness and K-functional, direct and inverse theorems of simultaneous approximation for a kind of multivariate trigonometric polynomial operators are established.
利用代沙格定理及其逆定理 ，对平面几何的几个共线点和共点线的问题给出简捷的证法。
With some examples in plane geometry, the author indroduces how to use Desargues theorem to simplify the proofs of problems of collinear points and concurrent lines.
本文明确表达了反函数微分法则的逆定理，基于此定理提出一种积分法，并举例说明了其运用方法。
This article explicitly expressed converse theorem of the inverse function differential principle, Based on this theorem, the author proposed one kind of integration, then gave some examples.
本文明确表达了反函数微分法则的逆定理，基于此定理提出一种积分法，并举例说明了其运用方法。
This article explicitly expressed converse theorem of the inverse function differential principle, Based on this theorem, the author proposed one kind of integration, then gave some examples.
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