Probably Art # 57: Circle

5 circles drawn in 2 shade(s) chosen from 3 unique size(s).

$$ s = .00047104, \; $$ $$ | \lbrace \theta \rbrace | = 2, $$ $$ | \lbrace r \rbrace | = 3,$$ $$ r_0 = 0.0500,$$ $$ R = 4.00, $$ $$r \sim \beta(2.000, 95.000), $$ $$\theta \sim \beta(9.000, 4.000). $$