若干函数空间中Jackson定理及有关问题

SOME FUNCTIONAL SPACES AND PROBLEMS

研究了Lp空间、LM＆空间、Ba空间中函数及各阶导函数用多项式算子同时逼近的Jackson定量的证明过程和使用的方法，阐述了这些函数空间相互联系与不同之处。

Find the essential law from the proof of Jackson theorem with derivative of global approximation by polynomials in Lp, spaces, LM spaces and Ba spaces. Illustrate the connection and difference of the three spaces.