Kronecker delta

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Kronecker delta

(ˈkrɒnɪkə)
n
(Mathematics) maths a function of two variables, i and j, that has a value of zero unless i = j, when it has a value of unity. Symbol: δij
[named after Leopold Kronecker (1823–91), German mathematician]
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Noun1.Kronecker delta - a function of two variables i and j that equals 1 when i=j and equals 0 otherwise
function, mapping, mathematical function, single-valued function, map - (mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function)