=+370 14. Poisson Approximation (Hints: Let I be the set of all 2n vertices, X the indicator

=+370 14. Poisson Approximation

(Hints: Let I be the set of all 2n vertices, Xα the indicator that vertex

α has all of its edges directed toward α, and Nα = {β : β −α ≤ 1}.

Note that Xα is independent of those Xβ with β − α > 1. Also, pαβ = 0 for β − α = 1.)