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
Den (o1,(A | (S1,f,g))) = Den (o2,A)