reserve n,m for Nat;

theorem Th19:
  for R1,R2 be non-decreasing real-valued FinSequence st
  R1,R2 are_fiberwise_equipotent holds R1 = R2
proof
  let g1,g2 be non-decreasing real-valued FinSequence;
  len g1 = len g1;
  hence thesis by Lm4;
end;
