Hsiang-Chun Hsu

activity

20172022

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2 papers · 1 filter

math.CO2017

Folding Phenomenon of Major-balance Identities on Restricted Involutions

Tung-Shan Fu, Hsian-Chun Hsu, Hsin-Chieh Liao

In this paper we prove a refined major-balance identity on the $321$ -avoiding involutions of length $n$ , respecting the leading element of permutations. The proof is based on a sig…

math.CO2017

Signed Countings of types B and D permutations and $t, q$ -Euler Numbers

Sen-Peng Eu, Tung-Shan Fu, Hsiang-Chun Hsu +1

It is a classical result that the parity-balance of the number of weak excedances of all permutations (derangements, respectively) of length $n$ is the Euler number $E_{n}$ , alternat…

Folding Phenomenon of Major-balance Identities on Restricted Involutions

Signed Countings of types B and D permutations and t,q-Euler Numbers

Signed Countings of types B and D permutations and $t, q$ -Euler Numbers