theorem LmCri2: :: FUZZY_8:20

for a, b, c, d being Real st b > 0 & c > 0 & d > 0 & d < b holds
for x being Real holds (d (#) (TrapezoidalFS ((a - c),(a + ((d - b) / (b / c))),(a + ((b - d) / (b / c))),(a + c)))) . x = min (d,(max (0,(b - |.((b * (x - a)) / c).|))))