Xiang Yu

most citedA new sieve for restricted multiset counting

4 citations · 4 across the 2 of their papers we have counts for

collaborators

3 papers

math.CA2023

The number of limit cycles of Josephson equation

Xiangqin Yu, Hebai Chen, Changjian Liu

In this paper, the existence and number of non-contractible limit cycles of the Josephson equation $β \frac{d ^{2} Φ}{d t ^{2}} + (1 + γ cos Φ) \frac{d Φ}{d t} + sin Φ = α$ are studied, where $ϕ\…

math.CO2019★ 4 cited

A new sieve for restricted multiset counting

Jiyou Li, Xiang Yu

The Li--Wan sieve is extended to multisets when the underlying set is symmetric. The main ingredient of the proof is the Mobius inversion formula on the poset of partitions of $\{1…

math.NT2019

Distinct coordinate solutions of linear equations over finite fields

Jiyou Li, Xiang Yu

Let $F_{q}$ be the finite field of $q$ elements and $a_{1}, a_{2}, \dots, a_{k}, b \in F_{q}$ . We investigate $N_{F_{q}} (a_{1}, a_{2}, \dots, a_{k}; b)$ , the number of order…