U+221E "∞" Infinity Unicode Character

U+221E "∞" Infinity is a typographic symbol representing the mathematical concept of boundlessness, most commonly used to denote infinite sets, limits, and endless processes in fields such as calculus and set theory. Its distinctive sideways figure eight design, which first appeared in print in a 1655 work by the mathematician John Wallis, was likely chosen for its visual suggestion of a never ending loop. Beyond mathematics, the symbol has been widely adopted in philosophy, physics, and popular culture to signify eternity, universality, or something without limit.