indices

In perhaps the most frequent sense, an index is a superscriptor subscriptto a symbol. Superscript indices are often, but not always, used to indicate powers. Subscript indices are usually used to identify an element of a setor arrayor sequence of variables. See also Index set, Indexed family, and Index (information technology). Index meaning exponent, the power to which some base is raised. The index of a subgroupis the number of its left cosets(which is equal to the number of its ...