MathLiveKronecker delta
The Kronecker delta equals 1 when its two indices are equal and 0 otherwise. It is used throughout linear algebra, tensor calculus and physics to write sums compactly, for example to express the identity matrix or orthonormality.
\delta_{ik} = \begin{cases} 1 & i = k \\ 0 & i \ne k \end{cases}What the symbols mean
| Kronecker delta, a function of the two indices i and k | |
| first index | |
| second index |
About this formula
- FieldMathematics
- TopicSpecial functions and notation
- LevelUniversity
- Also calledKronecker delta symbol, delta function discrete, identity matrix entries, Iverson bracket equality, kronecker delta definition
- SourceWikidata Q192826
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