Congruences related to dual sequences and Catalan numbers

Congruences related to dual sequences and Catalan numbers
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与双序列和加泰罗尼亚数相关的同余

DOI:
10.1016/j.ejc.2021.103458
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发表时间:
2020-10
影响因子:
1
通讯作者:
Michael X.X. Zhong
Michael X.X. Zhong
中科院分区:
数学3区
文献类型:
--
作者:
Rong-Hua Wang;Michael X.X. Zhong

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During the study of dual sequences, Z.-W. Sun introduced the polynomials D n (x, y)=∑ k= 0 n n k x k y k and S n (x, y)=∑ k= 0 n n k x k− 1− x k y k. Many related congruences were also established and conjectured. Here we generalize some of them by determining∑ k= 0 p− 1 D k (x 1, y 1) D k (x 2, y 2)(mod p) and∑ k= 0 p− 1 S k (x 1, y 1) S k (x 2, y 2)(mod p) for odd primes p and p-adic integers x i, y i with i∈{1, 2}. In addition, we also characterize∑ n= 0 p− 1∑ k= 0 n n k C k a k 2 (mod p), where C k denotes the k th Catalan number, a∈ Z∖{0} with gcd (a, p)= 1. These results confirm and generalize some of Z.-W. Sun’s conjectures.
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