Supported by Tianyuan Funds of China (Grant No. 10926143);YSF of Shanxi Province (Grant No. 20100210022);partially supported by NSFC (Grant No. 10971195);NSF of Zhejiang Province (Grant Nos. Y6090689, Y6110260)
In this paper, we study Toeplitz operators with harmonic symbols on the harmonic Dirichlet space, and show that the product of two Toeplitz operators is another Toeplitz operator only if one factor is constant.
Supported by Tianyuan Foundation of China (Grant No. 10926143);Young Science Foundation of Shanxi Province(Grant No. 2010021002-2);the National Natural Science Foundation of China (Grant No. 10971195);the Natural Science Foundation of Zhejiang Province (Grant Nos. Y6090689; Y6110260)
In this paper, we show that a multiplication operator on the Dirichlet space D is unitarily equivalent to Dirichlet shift of multiplicity n + 1 (n ≥ 0) if and only if its symbol is c zn+1 for some constant c. The...
Supported by the National Natural Science Foundation of China (Grant No.10971195);the Natural Science Foundation of Zhejiang Province (Grant Nos.Y6090689; Y6110260)
In this paper,we prove that the necessary and sufficient condition for a Toeplitz operator Tu on the Dirichlet space to be hyponormal is that the symbol u is constant for the case that the projection of u in the Diric...