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Re: Defining function

• To: mathgroup at smc.vnet.net
• Subject: [mg44568] Re: Defining function
• From: drbob at bigfoot.com (Bobby R. Treat)
• Date: Fri, 14 Nov 2003 04:43:15 -0500 (EST)
• References: <bovtvd$nbc$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

f[t_?Positive]:=Exp[-I t]
f[t_?Negative]:= 0

That leaves f[0] undefined, just as you did.

Bobby

"Ravinder Kumar B." <ravi at crest.ernet.in> wrote in message news:<bovtvd$nbc$1 at smc.vnet.net>...
> Dear All,
> How to define a function over two different ranges in mathematica.
> For example
> 
> f(t):= Exp[-i*t]  for t > 0   and
>      = 0          for t < 0
> 
> Your response/clarification will be deeply appreciated.
> Regards,
> Ravi