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。
Sine and Cosine is the triangular relationship between the corners and trigonometric functions of the most common, the two most important theorems.
正、余弦定理的几点应用摘要正弦定理和余弦定理是三角形边角关系及三角函数种最常见、最主要的两个定理。
Sine and Cosine is the triangular relationship between the corners and trigonometric functions of the most common, the two most important theorems.
正、余弦定理的几点应用摘要正弦定理和余弦定理是三角形边角关系及三角函数种最常见、最主要的两个定理。
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