Treatment of L-Fuzzy contexts with absent values

Multi-adjoint t-concept lattices

“…; ng is a mapping which associates any element in B with some particular adjoint triple in the frame. 2 Once we have fixed a multi-adjoint frame and a context for that frame, we can define the following mappings " r : L B 2 ! L A 1 and # r : L A 1 !…”

“…Items (1),(2) and(3)are equivalent to the fact that V 1 and V 2 represent the concept lattices L, L op , respectively, considering the relation R : A Â B ! P defined as Rða; bÞ ¼ Iðb; aÞ and Theorem 21.…”

On the solutions of L-fuzzy relational equations with sub-triangle composition and its relation with the L-Fuzzy Concept Theory

“…There exist in the literature extensions of the formal concept theory to L-fuzzy subsets, ( [9], [10], [12], [4], [5], [6], [20], [21], [2], [15], [22]). In these extensions, the incidence relation R of…”

Building multi-adjoint concept lattices

“…Formal concept analysis (FCA) has been extended with ideas from fuzzy set theory [1,2,3], fuzzy logic reasoning [4,5,6], rough set theory [7,8,9], some integrated approaches such as fuzzy and rough [10], or rough and domain theory [11].…”