On a period of elements of pseudo-BCI-algebras
The notions of a period of an element of a pseudo-BCI-algebra and a periodic pseudo-BCI-algebra are defined. Some of their properties and characterizations are given.
On a periodic part of pseudo-BCI-algebras
In the paper the connections between the set of some maximal elements of a pseudo-BCI-algebra and deductive systems are established. Using these facts, a periodic part of a pseudo-BCI-algebra is studied.
On annihilators of BCK-algebras
On axiom systems of pseudo-BCK algebras.
On B-algebras
On BE-semigroups.
On BF-algebras
On branchwise implicative BCI-algebras.
On -algebras
On -ideals in -algebras
On -subalgebras of -transitive -algebras
On -derivations of BCI-algebras.
On fuzzy -algebras
The fuzzification of (normal) -subalgebras is considered, and some related properties are investigated. A characterization of a fuzzy -algebra is given.
On fuzzy dot subalgebras of BCH-algebras.
On fuzzy topological -algebras
On fuzzy topological subalgebras of BCC-algebras
We describe properties of subalgebras and BCC-ideals in BCC-algebras with a topology induced by a family of fuzzy sets.
On hyper BCC-algebras.
On ideals and congruences in BCC-algebras
We introduce a new concept of ideals in BCC-algebras and describe connections between such ideals and congruences.
On ideals in Hilbert algebras
On imaginable -fuzzy subalgebras and imaginable -fuzzy closed ideals in BCH-algebras.