คำศัพท์คณิตศาสตร์
In [1, 2], Q.P. Hu and X. Li introduced a wide class of abstracts: BCH-algebras. They have shown that the class of BCI-algebras is a proper subclass of the BCH-algebras. In [5], B.L. Meng introduced the notion paper, we considered as a generation of a BE-algebra. In this paper, we considered ideal and filter of CI-algebra, and some fundamental properties to CI-algebra and discussed.