theorem Th23: :: BVFUNC14:23

for Y being non empty set
for G being Subset of (PARTITIONS Y)
for A, B, C, D, E being a_partition of Y st G = {A,B,C,D,E} & A <> C & B <> C & C <> D & C <> E holds
CompF (C,G) = ((A '/\' B) '/\' D) '/\' E