http://hdl.handle.net/2117/1176 2013-05-25T08:31:54Z http://hdl.handle.net/2117/1178 Title: A map characterizing the fuzzy points and columns of a T-indistinguishability operator Authors: Boixader Ibáñez, Dionís; Recasens Ferrés, Jorge Abstract: A new map (ΛE) between fuzzy subsets of a universe X endowed with a T-indistinguishability operator E is introduced. The main feature of ΛE is that it has the columns of E as fixed points, and thus it provides us with a new criterion to decide whether a generator is a column. Two well known maps (φE and ψE) are also reviewed, in order to compare them with ΛE. Interesting properties of the fixed points of ΛE and Λ2 E are studied. Among others, the fixed points of ΛE (Fix(ΛE)) are proved to be the maximal fuzzy points of (X,E) and the fixed points of Λ2 E coincide with the Image of ΛE. An isometric embedding of X into Fix(ΛE) is established and studied. 2007-09-06T12:42:47Z