MathSciNet bibliographic data MR2053353 (2005a:47060) 47B49 (47A12) Bai, Zhaofang; Hou, Jinchuan Numerical radius distance-preserving maps on \$\scr B(H)\$$\scr B(H)$. Proc. Amer. Math. Soc. 132 (2004), no. 5, 1453–1461. Article

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