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math.CO2021
Rooted quasi-Stirling permutations of general multisets
Shishuo Fu, Yanlin Li
Given a general multiset , where appears times, a multipermutation of is called {\em quasi-Stirling}, if…
math.CO2021
Permanent identities, combinatorial sequences, and permutation statistics
Shishuo Fu, Zhicong Lin, Zhi-Wei Sun
In this paper, we confirm six conjectures on the exact values of some permanents, relating them to the Genocchi numbers of the first and second kinds as well as the Euler numbers.…