theorem Th28: :: MSUALG_2:28

for S being non empty non void ManySortedSign
for U0 being non-empty MSAlgebra over S
for U1, U2 being MSSubAlgebra of U0 holds (U1 /\ U2) "\/" U2 = MSAlgebra(# the Sorts of U2, the Charact of U2 #)