2 puts "0031407: Extrema does not process parallel circles correctly"
6 circle c1 0 0 0 0 0 1 5
7 circle c2 0 0 0 0 0 1 10
9 if { [regexp "Infinite number of extremas" [extrema c1 c2]] == 1} {
10 puts "OK : Circles are treated as concentric"
12 puts "Error : Extrema does not find the circles are parallel"