Christensen, Ole et Xiao, Xiang Chun, Characterizing R-duality in Banach spaces, Acta mathematica Sinica. English series (Print) , 29(1), 2013, pp. 75-84
R-duals of certain sequences in Hilbert spaces were introduced by Casazza, Kutyniok and Lammers in 2004 and later generalized to Banach spaces by Xiao and Zhu. In this paper we provide some characterizations of R-dual sequences in Banach spaces.