👉 Monotic is a mathematical concept in set theory and logic. It refers to a class of sets that are closed under complementation, meaning that if $A$ and $B$ are subsets of a given set $X$, then $(A \cup B) \setminus A = B$ (the empty set). This property is often used to define the concept of a "monotone function", where a function is monotonic if for any two points in its domain, there exists an