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delta function

• To: mathgroup at smc.vnet.net
• Subject: [mg89813] delta function
• From: Magician <jadoo.dost at gmail.com>
• Date: Sat, 21 Jun 2008 05:30:54 -0400 (EDT)

I am integrating over a function (not written in mathematica syntax)

u=F(x)   e^(-  (x-xo)^2/t  ) /t  ,
i know in the limit t ->0,  e^(-  (x-xo)^2/t  ) /t = delta(x-xo), but
how do i get mathematica to recognize this.

In mathematica, how can i construct hings like the Sokhotskyi-Plemelj
formula ?