University of Guilan Journal of Algebra and Related Topics 2345-3931 7 1 2019 06 01 On the Class of Subsets of Residuated lattice which induces a Congruence Relation 1 12 3687 10.22124/jart.2019.11333.1119 EN H. Harizavi Department of Mathematics, Faculty of Mathematical Sciences and Computer, Shahid Chamran University of Ahvaz, Ahvaz, Iran Journal Article 2018 09 22 In this manuscript,  we study the class of special subsets connected with a  subset in a residuated lattice and investigate some related properties. We describe the union of elements of this class. Using the intersection of all special subsets connected with a subset, we give a necessary and sufficient condition for a subset to be a filter.  Finally, by defining some operations, we endow this class with a residuated lattice structure and prove that it is isomorphic to the set of all congruence classes with respect to a filter. https://jart.guilan.ac.ir/article_3687_5299c0b4ef0a8acd5f965ad25c45b012.pdf