为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......

讨论了Hardy空间H2()上的Toeplitz算子Tφ的亚正规性质.Toeplitz算子Tφ的亚正规性质完全由符号函数φ所确定.文章在Toeplitz算子T......

In this paper,we prove that the necessary and sufficient condition for a Toeplitz operator Tu on the Dirichlet space to ......