Category:Definitions/Indices

This category contains definitions related to Indices.
Related results can be found in Category:Indices.

• Set Theory:
  • Index: an element of an indexing set
  • Index set, set of indices: other names for an indexing set

• Sequences:
  • Index: the index of a term $x_k$ of a sequence $\sequence {x_n}$ is $k$

• Group Theory:
  • Index: order of coset space

• 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.