Two Quick Proofs of a Catalan Lemma Needed by Lisa Sauermann and Yuval Wigderson
Shalosh B. Ekhad, Doron Zeilberger·2020-11-16·via math.CO updates on arXiv.org
We present two proofs each, all shorter than the original proofs, of two elegant combinatorial identities that came up in the beautiful article arXiv:2010.00077 .