Geometric distribution

[Giulio Bottazzi]

Hi all, 
I've a simple question: why the geometric distribution, inside GSL, is
defined according to

prob(k) =  p (1 - p)^(k-1) for k = 1, 2, 3, ...

rather than the more canonical

prob(k) = p (1-p)^k for k = 0, 1, 2, ...

is there some deep reason I'm missing?

	Giulio
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