关于Bessel函数的素性

本文中我们证明了:Bessel函数J_ν(z)当ν为奇数时是素的,而当ν为偶数时,z~2是J_ν(z)仅有的右因子。     

符号为有限Blaschke积的Toeplitz算子的换位与约化

本文刻划了Ｈａｒｄｙ空间或Ｂｅｒｇｍａｎ空间上符号为有限Ｂｌａｓｃｈｋｅ积的Ｔｏｅｐｌｉｔｚ算子的换位,并讨论了其完全可约性。     

Diricher空间上Toeplitz算子的若干问题

讨论了Dirichlit空间上Toeplitz算子的紧性,特别地得到了Schatlen类Toeplitz算子的特征,此外,还证明了关于Toeplitz算子的一个非稠密性定理,并证明一个非零的函数可以诱导一个零算子,这与Hardy空间及Bergman空间情形是一重大差别。     

Algebraic Properties of Generalized Toeplitz Operators

§ 1.Introduction　 Let D be the unit disk of the complex plane C,T the unit circle,and H2 the Hardyspace of the unit circle.For operators on H2 ,all matrices in the sequel will be formedwith respect to the basis { e0 ,e1 ,… } defined by en(z) =zn,n=0 ,1 ,2 ,… . Ifφ∈ L∞ (T) ,write Tφfor the corresponding Toeplitz operator defined on H2 by Tφf=P(φf) (where Pis the projection from L2 (T) onto H2 ) .The Toeplitz operator Te1,the so called unilat-eral shift,will be denoted by U thr…     

A NOTE TO THE NEVANLINNA'S FUNDAMENTAL THEOREM

In this paper, the author xtends Nevanlinna's second fundamental theorem and establishes the following inequality:Let p(z, u)=A_v(z)u~v A_1(z)u~(v-1) … A_0(z)be an irreducible two-variable polynomial and f(z) a transcendental entire function, then with(v-1)T(r,f)<(r,1/(p(z,f(z))) S(r,f)withS(r,f)=O(log(rT(r,f)))n, e.where "n. e." means that the estimation holds for all large r with possibly an exceptional set of finite measure when f is of infinite order.     

函数空间上总体紧Toeplitz算子序列

本文讨论了Ｂｅｒｇｍａｎ空间及Ｈａｒｄｙ空间上总体紧的Ｔｏｅｐｌｉｔｚ算子序列．否定回答了陈晓漫等人在文［１］中提出的两个问题．     

符号为有限Blaschke积的Toeplitz算子的换位与约化

本文刻划了Hardy空间或Bergman空间上符号为有限Blaschke积的Toeplitz算子的换位,并讨论了其完全可约性.     

Dirichet空间上Toeplitz算子的若干问题

讨论了Dirichlet空间上Toeplitz算子的紧性,特别地得到了Schatlen类Toeplitz算子的特征.此外,还证明了关于Toeplitz算子的一个非稠密性定理,并证明一个非零的函数可以诱导一个零算子,这与Hardy空间及Bergman空间情形是一重大差别.