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相关作者:戴华何金苏许贵桥杜英芳南朝勋更多>>
相关机构:南京航空航天大学东南大学安徽师范大学天津师范大学更多>>
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On the Four Conjectures of G G Lorentz Type in L_ρ~2[-a,a]
《Chinese Quarterly Journal of Mathematics》2009年第3期343-348,共6页王元恒 杨文善 
Supported by the NNSF of China(10771141)
In the space C[-1,1],G G Lorentz proposed four conjectures on the properties of the polynomials of the best approximation in 1977,1978 and 1980.The present paper transplants the four conjectures in the space Lρ2[-a,a...
关键词:best approximation Lorentz's conjecture different norms property of polynomial 
On Converse Theorem of Best Approximation by Polynomials in Bergman Spaces H_q^p(p>0,q>1)
《Chinese Quarterly Journal of Mathematics》1993年第4期89-98,共10页邢富冲 
This paper is a part of the author's series of letures at the Mathematical Institute of the Hungarian Academy of Sciences while visiting Hungary sent by the state Education Committee,the People's Republic of China.
A Bernstein type theorem and a converse theorem of best approximation by polynomials in Bergman spaces Hq^p(p>0,q>1) are proved.Some proofs and results in [1] are in proved.
关键词:Bergman spaces H_q^p(p>0 q>1) integral modulus of continuity Bernsterin type inequality best approximation by polynomial converse theorem 
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