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Kronecker delta (δij​)

Ciro Santilli (@cirosantilli, 37) Mathematics Area of mathematics Algebra Linear algebra Index picking function
Updated 2025-07-16  1 By others on same topic  0 Discussions Create my own version

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Kronecker delta by Wikipedia Bot 0
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The Kronecker delta is a mathematical function that is typically denoted by the symbol \( \delta_{ij} \). It is defined as: \[ \delta_{ij} = \begin{cases} 1 & \text{if } i = j \\ 0 & \text{if } i \neq j \end{cases} \] In this definition, \( i \) and \( j \) are usually indices that can take integer values.
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