theorem Th46:
for
i being
Nat for
G being
Go-board st 1
<= i &
i < len G holds
LSeg (
(((1 / 2) * ((G * (i,1)) + (G * ((i + 1),1)))) - |[0,1]|),
((1 / 2) * ((G * (i,1)) + (G * ((i + 1),1)))))
c= (Int (cell (G,i,0))) \/ {((1 / 2) * ((G * (i,1)) + (G * ((i + 1),1))))}