Infinity symbol symbol is encoded in Unicode at and in LaTeX as codice_1: formula_4. The Unicode set of symbols also includes several variant forms of the infinity symbol, that are less frequently available in fonts: , and in block Miscellaneous Mathematical Symbols-B. The acid-free paper symbol mentioned above is encoded separately as . Infinity symbol The infinity symbol (sometimes called the lemniscate) is a mathematical symbol representing the concept of infinity. The shape of a sideways figure eight has a long pedigree; for instance, it appears in the cross of Saint Boniface, wrapped around the bars of a Latin cross. However, John
Turned A 19th century by Charles Sanders Peirce as a logical symbol for 'un-American' ("unamerican"). The symbol ∀ has the same shape as a capital turned A, sans-serif. It is used to represent universal quantification in predicate logic. When it appears in a formula together with a predicate variable, they are referred to as a "universal quantifier". In traffic engineering it is used to represent flow, the number of units (vehicles) passing a point in a unit of time. Turned A Turned A (capital: Ɐ, lowercase: ɐ, math symbol ∀) is a symbol based upon the letter A. Lowercase ɐ (in two