訂正日: 2006/10/20訂正理由: -訂正箇所: 引用文献情報訂正内容: Wrong : 1) W. F. Donoghue, Jr., On the numerical range of a bounded operator, Michigan Math. J., 4 (1957), 261-263. 2) M. R. Embry, The numerical range of an operator, Pacific J. Math., 32 (1970), 647-650. 3) M. R. Embry, The numerical range of an operator, II, Notices Amer. Math. Soc., 21 (1974), A-196. 4) P. R. Halmos, A Hilbert Space Problem Book, Van Nostrand, Princeton, 1967. 5) C. H. Meng, On the numerical range of an operator, Proc. Amer. Math. Soc., 14 (1963), 167-171. 6) N. Salinas, On the η function of Brown and Pearcy and the numerical function of an operator, Canad. J. Math., 23 (1971), 565-578. 7) J. G. Stampfli, Extreme points of the numerical range of a hyponormal operator, Michigan Math. J., 13 (1966), 87-89.
Right : [1] W. F. Donoghue, Jr., On the numerical range of a bounded operator, Michigan Math. J., 4 (1957), 261-263. [2] M. R. Embry, The numerical range of an operator, Pacific J. Math., 32 (1970), 647-650. [3] M. R. Embry, The numerical range of an operator, II, Notices Amer. Math. Soc., 21 (1974), A-196. [4] P. R. Halmos, A Hilbert Space Problem Book, Van Nostrand, Princeton, 1967. [5] C. H. Meng, On the numerical range of an operator, Proc. Amer. Math. Soc., 14 (1963), 167-171. [6] N. Salinas, On the η function of Brown and Pearcy and the numerical function of an operator, Canad. J. Math., 23 (1971), 565-578. [7] J. G. Stampfli, Extreme points of the numerical range of a hyponormal operator, Michigan Math. J., 13 (1966), 87-89.