Encyclopedia > Kronecker delta

  Article Content

Kronecker delta

In mathematics, the Kronecker delta is a function of two variables, which is 1 if they are equal, and 0 otherwise. It is written as the symbol δij, and treated as a notational shorthand rather than a function.

<math>\delta_{ij} = \left\{\begin{matrix}
1 & \mbox{if } i=j \\ 0 & \mbox{if } i \ne j \end{matrix}\right.</math>

It is named after mathematician Leopold Kronecker[?] (1823-1891).

It is used in many areas of mathematics. For example, in linear algebra, the identity matrix can be written as:

ij)

See also Levi-Civita symbol.



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
University of Warwick

... 5 or 5*. 22 of the 24 University academic departments which have been assessed under the Subject Review process conducted by the Quality Assurance Agency for Higher ...