Propagation of trust and distrust
Proceedings of the 13th international conference on World Wide Web
Gradual trust and distrust in recommender systems
Fuzzy Sets and Systems
General IF-sets with triangular norms and their applications to group decision making
Information Sciences: an International Journal
A many valued representation and propagation of trust and distrust
WILF'05 Proceedings of the 6th international conference on Fuzzy Logic and Applications
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Trust networks have been recognized as a valuable component of many modern systems, such as e-commerce or recommender systems, as they provide a way of quality assessment. In addition to adequate modeling of trust in such network, two fundamental issues need to be addressed: the methods of propagation and aggregation of trust. In this paper we present an operator that performs both propagation and aggregation of trust. Trust is modeled on the basis of IFS theory (Atanassov's intuitionistic fuzzy set theory) with particular emphasis on uncertainty, and the operator is based on relative scalar cardinality of IFS. The operator can be used in a very flexible manner for prediction of local and global trust.