Re: Dirac Delta Function
- To: mathgroup at smc.vnet.net
- Subject: [mg4110] Re: Dirac Delta Function
- From: ianc (Ian Collier)
- Date: Wed, 5 Jun 1996 01:36:56 -0400
- Organization: Wolfram Research, Inc.
- Sender: owner-wri-mathgroup at wolfram.com
In article <4ojdr2$5i8 at dragonfly.wolfram.com>, jslater at valhalla.cs.wright.edu (Joseph C. Slater) wrote: > Is there a way to incorporate the Dirca Delta function into Mathematica? > I'd like to have a function like f=Dirac[t]+Dirac[t-1] > > such that > Integrate[t f,{t,-1,2}] > Yields 1. > > JS > > -- DiracDelta, which is defined in Calculus`DiracDelta` one of the standard packages distributed with every copy of Mathematica, does exactly what you want. Here is an example: In[3]:= Needs[ "Calculus`DiracDelta`" ] In[4]:= f=DiracDelta[t]+DiracDelta[t-1] Out[4]= DiracDelta[-1 + t] + DiracDelta[t] In[5]:= Integrate[t f,{t,-1,2}] Out[5]= 1 Calculus`DiracDelta` is documented on pages 18-21 of "The Guide to Standard Mathematica Packages" Technical Report. I hope this helps. --Ian ----------------------------------------------------------- Ian Collier Wolfram Research, Inc. ----------------------------------------------------------- tel:(217) 398-0700 fax:(217) 398-0747 ianc at wolfram.com Wolfram Research Home Page: http://www.wolfram.com/ ----------------------------------------------------------- ==== [MESSAGE SEPARATOR] ====