Re: Defining function

*To*: mathgroup at smc.vnet.net*Subject*: [mg44541] Re: [mg44539] Defining function*From*: Andrzej Kozlowski <akoz at mimuw.edu.pl>*Date*: Fri, 14 Nov 2003 01:58:34 -0500 (EST)*References*: <200311131236.HAA23886@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

One of the nicest things about Mathematica is that although you are clearly a beginner you have almost got it right! f[t_]/;t>0 :=Exp[-I t]; f[t_]/;t<0 := 0; Note that when you do that f[0] remains undefined. You can define it separately, e.g f[0] := Sqrt[Pi] or whatever. Andrzej Kozlowski Yokohama, Japan http://www.mimuw.edu.pl/~akoz/ On 13 Nov 2003, at 21:36, Ravinder Kumar B. wrote: > 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 > > >

**References**:**Defining function***From:*"Ravinder Kumar B." <ravi@crest.ernet.in>