The Kronecker delta function (represented with δ) is a piecewise function of two variables such that It is most useful when used for integers. For example, the n × n identity matrix can be written as a matrix where each entry is the Kronecker delta of i and j. This is useful for defining an inner or dot product: File:Linear subspaces with shading.svg This linear algebra-related article contains minimal information concerning its topic. You can help the Mathematics Wikia by adding to it.
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