theorem Th10: :: PARSP_2:10

for FdSp being FanodesSp
for a, b, c being Element of FdSp st a,b,c are_collinear holds
( a,c,b are_collinear & c,b,a are_collinear & b,a,c are_collinear & b,c,a are_collinear & c,a,b are_collinear ) by PARSP_1:24;