[ Δ ] , , . [ Δ ] £ /3 , Δ, . 500 8.051-81, 50-98-86. . , 1/3 .
(1/51/3) , . , 20 ( 5 ), (1,01,6) .
( ), ( ), . (R) (Rn), 2 Δ > R 2 Δ > Rn, .
(R ≤ 2 Δ), (Rn > R) R, ( ) Rn, Rn ≥ R.
(R > 2 Δ), (Rn ≈ R), Rn ( ), , Rn ≥ R. , R Rn, .
R Rn ( , Δ < R, Rn ≥ R), [ Δ ] = Δ.
. [ Δ ] < Δ. R Rn ( Rn ≥ R),
Δ ≈ (1/10)Rn
Δ ≈ (1/10)R.