for a, b being Real st a > b holds
( B-Meas . [.a,b.] = 0 & B-Meas . [.a,b.[ = 0 & B-Meas . ].a,b.] = 0 & B-Meas . ].a,b.[ = 0 & L-Meas . [.a,b.] = 0 & L-Meas . [.a,b.[ = 0 & L-Meas . ].a,b.] = 0 & L-Meas . ].a,b.[ = 0 )