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A: Probability that all available IP
R's become open, 
, as a function of the dimensionless radius of
influence, 
, for 
(circles), 
(squares) and 
(triangles). B: 
(circles), 
(squares) and 
(triangles) as functions of 
. The values of 
and 
for the case with 
are indicated in A with one and two asterisks,
respectively.
