reserve T for 1-sorted;
reserve T for TopSpace;

theorem Th15:
  [#] T is condensed
proof
  [#] T c= Cl [#] T by PRE_TOPC:18;
  then
A1: [#] T c= Cl Int [#] T by TOPS_1:15;
  Int Cl [#] T c= [#] T;
  hence thesis by A1,TOPS_1:def 6;
end;
