摘要: The aim of this paper is to prove the problem 2.2.2 in Braiteli's paper. It is proved that the problem is true for amenable group action.
颉火安. ON DENSITY OF SMOOTH ELEMENTS FOR AN ACTION OF AN AMENABLE GROUP[J]. 数学物理学报(英文版), 1993, 13(3): 261-265.
Xie Huo'an. ON DENSITY OF SMOOTH ELEMENTS FOR AN ACTION OF AN AMENABLE GROUP[J]. Acta mathematica scientia,Series B, 1993, 13(3): 261-265.