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3.


, .
, (3.1)
γ (γ = 1,5);
xN , (xN = 50 )

σ(1/ r 2) = │-2r -3│ σ( r), (3.2)
r ;
σ( r)

n = c/λ , (3.3)
;
λ

U = aν + b , (3.4)