reserve S for non empty non void ManySortedSign;
reserve X for non-empty ManySortedSet of S;
reserve x,y,z for set, i,j for Nat;

theorem
  for A,B being non-empty MSAlgebra over S
  st the MSAlgebra of A = the MSAlgebra of B
  holds A is (X,S)-terms implies B is (X,S)-terms;
