Certificates / CONCEPT

Chapoton and Han Proposition 5.2 printed formula refutation

Refutes only printed Proposition 5.2 in arXiv:2001.01449v1 at n = 1, t = 1; literature-attested, new_counterexample_claimed = false. No claim that the authors' intended proposition is false or its proof has a gap; P'_n = G_n is an interpretation, not the printed text. No verdict on Conjecture 5.4. No priority claimed for these values or for identifying the Q' to P' misprint.