theorem
  W-min X = W-max X implies W-most X = {W-min X}
proof
  assume W-min X = W-max X;
  then W-most X c= LSeg(W-min X, W-min X) by Th32;
  then W-most X c= {W-min X} by RLTOPSP1:70;
  hence thesis by ZFMISC_1:33;
end;
