[1] Axler S. Bergman Spaces and Their Operators//Surveys of Some Recent Results in Operator Theory, Vol I. Pitman Research Notes in Mathematics, 1988, 171:1-50[2] Cowen C. Hyponormality of Toeplitz operators. Proc Amer Math Soc, 1988, 103:809-812[3] Curto R E, Hwang I S, Lee W Y. Hyponormality and subnormality of block Toeplitz operators. Adv Math, 2012, 230:2094-2151[4] Gu C, Hendricks J, Rutherford D. Hyponormality of block Toeplitz operators. Pacific J Math, 2006, 223:95-111[5] Hedenmalm H, Korenblum B, Zhu K. Theory of Bergman Spaces. New York:Springer-Verlag, 2000[6] Hwang I S, Kang D O, Lee W Y. A gap between hyponormality and subnormality for block Toeplitz operators. J Math Anal Appl, 2011, 382:883-891[7] Hwang I S, Lee J. Hyponormal Toeplitz operators on the weighted Bergman spaces. Math Inequal Appl, 2012, 15:323-330[8] Hwang I S, Lee J, Park S W. Hyponormal Toeplitz operators with polynomial symbols on weighted Bergman spaces. J Inequal Appl, 2014:1-8 |