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Re: Defining function


"Ravinder Kumar B." <ravi at crest.ernet.in> writes:

> 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
> 

E.g.:
f[t_]:=If[t>=0, Exp[-i t], 0]

Look at the help for 'If'


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