:: deftheorem OpEx2Def defines OpEx2 LATQUASI:def 5 :
for x, y being Element of {0,1,2} holds
( ( ( x = 1 or y = 1 ) implies OpEx2 (x,y) = 1 ) & ( x <> 1 & y <> 1 implies OpEx2 (x,y) = min (x,y) ) );