[EN] In this paper we present the construction of a group Hopf algebra on the class of rational tangles. A locally finite partial order on this class is introduced and a topology is generated. An interval coalgebra structure ...
Milani, Vida; Rezaei, Ali Asghar; Mansourbeigi, Seyed M.H.(Universitat Politècnica de València, 2011-10-01)
[EN] The approach we present is a modification of the Morse theory for unital C*-algebras. We provide tools for the geometric interpretation of noncommutative CW complexes. Some examples are given to illustrate these ...