👉 In mathematics, a sequence of numbers is said to be "summable" if it has a limit that can be expressed as an infinite sum. This means that there exists a positive real number L such that for every ε > 0, there exists a natural number N such that |x_n - L| < ε/n for all n ≥ N. The term "summability" is often used to denote the ability of a sequence of numbers to be "summable". In other words
