3 citations · 3 across the 2 of their papers we have counts for
2 papers
math.CO2015★ 3 cited
The number of 1...d-avoiding permutations of length d+r for SYMBOLIC d but numeric r
Shalosh B. Ekhad, Nathaniel Shar, Doron Zeilberger
We use the Robinson-Schensted correspondence, followed by symbol-crunching, in order to derive explicit expressions for the quantities mentioned in the title. We follow it by numbe…
math.CO2015
A Very Short (Bijective!) Proof of Touchard's Catalan Identity
Amitai Regev, Nathaniel Shar, Doron Zeilberger
A very short, bijective proof, of Touchard's Catalan identity is given, using Dyck paths.