Bin Chen

collaborators

2 papers

math.NT2023

On almost-prime $k$ -tuples

Bin Chen

Let $τ$ denote the divisor function and $H = {h_{1}, ..., h_{k}}$ be an admissible set. We prove that there are infinitely many $n$ for which the product $\prod_{i=1}^{k}(n…

math.CO2022

Maximum size of $C_{\leq k}$ -free strong digraphs with out-degree at least two

Bin Chen, Xinmin Hou

Let $H$ be a family of digraphs. A digraph $D$ is \emph{ $H$ -free} if it contains no isomorphic copy of any member of $H$ . For $k \geq 2$ , we set $C_{\le…

On almost-prime k-tuples

Maximum size of C≤k​-free strong digraphs with out-degree at least two

On almost-prime $k$ -tuples

Maximum size of $C_{\leq k}$ -free strong digraphs with out-degree at least two