theorem Th24:
for
S1,
S2 being non
empty non
void ManySortedSign for
f,
g being
Function st
f,
g form_morphism_between S1,
S2 holds
for
A being
MSAlgebra over
S2 for
o1 being
OperSymbol of
S1 for
o2 being
OperSymbol of
S2 st
o2 = g . o1 holds
(
Args (
o2,
A)
= Args (
o1,
(A | (S1,f,g))) &
Result (
o1,
(A | (S1,f,g)))
= Result (
o2,
A) )