reserve X,Z for set;
reserve x,y,z for object;
reserve A,B,C for Subset of X;

theorem Th91:
  for A being connected transitive RelStr, B being finite Subset of A holds
    ex s being FinSequence of A st s is B-asc_ordering
proof
  let A be connected transitive RelStr, B be finite Subset of A;
  the InternalRel of A is_connected_in the carrier of A by Def1;
  hence thesis by Th16, Th89;
end;
