The symbol ∞ (sideways 8) means what in mathematics?
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
Identity (mathematics) Identity (mathematics) In mathematics an identity is an equality relation "A" = "B", such that "A" and "B" contain some variables and "A" and "B" produce the same value as each other regardless of what values (usually numbers) are substituted for the variables. In other words, "A" = "B" is an identity if "A" and "B" define the same functions. This means that an "identity" is an "equality" between functions that are differently defined. For example, ("a" + "b") = "a" + 2"ab" + "b" and are identities. Identities are sometimes indicated by the triple bar symbol instead of ,