👉 The term "isbas" is a term used in mathematics and computer science to denote a relation between two sets. It is often represented by the symbol ∼ or ≈, which stands for "approximately equals". The relation of isbas can be defined as follows: 1. A set S is said to be isbas over a set T if there exists an element x in S such that the complement of x (i.e., the set of all elements not in S) is equal to