aInstitute of Mathematics and Physics, University
of Siedlce, 3 Maja 54, 08–110 Siedlce, Poland bWarsaw School of Information Technology,
Newelska 6, 01–447 Warszawa, Poland
Аннотация:
CI-algebras are a generalization of BE-algebras and dual BCK/BCI/BCH-algebras. In this paper filters of CI-algebras are considered. Given a subset of a CI-algebra, the least filter containing it is constructed. An equivalent condition of the filters using the notion of upper sets is provided.