theorem Th28: :: FACIRC_2:28

for x, y, c being set
for s being State of (MajorityCirc (x,y,c))
for a1, a2, a3 being Element of BOOLEAN st a1 = s . [<*x,y*>,'&'] & a2 = s . [<*y,c*>,'&'] & a3 = s . [<*c,x*>,'&'] holds
(Following s) . (MajorityOutput (x,y,c)) = (a1 'or' a2) 'or' a3