👉 In mathematics, a "denotation" is a specific type of symbol or expression that carries meaning. It is used to indicate what the symbol represents in relation to some other symbols or concepts. Denotations are often used to describe mathematical objects, such as variables, functions, and relations. For example, if we have a set of numbers {1, 2, 3}, we can denote each number by its own letter (e.g., "a", "b", "c").