👉 Irreversibility in mathematics refers to a property of functions or operations that can be undone by performing an operation on one side of the function, but not the other. In simpler terms, if you have two functions f(x) and g(x), then f(x) is said to be reversible if there exists an inverse function h(x) such that h(f(x)) = x for all values of x in the domain of h. For example, consider a function f(x) = 2