Delta Function

Delta function may refer to the distribution:

  • Dirac delta function,

or the indexed matrix:

  • Kronecker delta, \delta_{ij} = \left\{\begin{matrix} 1, & \mbox{if } i=j \\ 0, & \mbox{if } i \ne j \end{matrix}\right.


Famous quotes containing the word function:

    “It is the function of vice to keep virtue within reasonable bounds.”
    —Samuel Butler (1835–1902)