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DiracDelta multiplication question ...

  • To: mathgroup at smc.vnet.net
  • Subject: [mg38977] DiracDelta multiplication question ...
  • From: Matt Flax <flatmax at ieee.org>
  • Date: Thu, 23 Jan 2003 08:04:55 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

Why doesn't this multiplication equal zero ?

In[1]:= DiracDelta[2 + t] DiracDelta[t]
Out[1]= DiracDelta[t] DiracDelta[2 + t]

A delta multiplied by a delayed delta = 0 ... right ?

Also like this :

In[2]:= DiracDelta[2 + t] DiracDelta[t] // SimplifyDiracDelta
Out[2]= SimplifyDiracDelta[DiracDelta[t] DiracDelta[2 + t]]

thanks
Matt




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