Definition:Index
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Disambiguation
This page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.
Index may refer to:
- Set Theory:
- Index: an element of an indexing set
- Index set, set of indices: other names for an indexing set
- Matrix Theory:
- Index of Matrix Element: one of the two parameters which specifies an element of a matrix
- Arithmetic:
- Index notation: another word for scientific notation
- Algebra and Analysis:
- Index (Algebra): the $y$ term in expressions such as $x^y$, more commonly known as the exponent of $x$
- Index of Root: the $n$ term in expressions such as $\sqrt [n] x$
- Index variable: the bound variable $j$ in the summation $\ds \sum_{j \mathop = 1}^n a_j$
- Statistics:
- Index number: A figure used to show the variation in a quantity over a period of time.