2 papers
math.CO2026
Hypergraph ErdÅs--Rogers functions with consecutive clique sizes
Qizhong Lin, Lin Niu
For integers \(k\le s<t\), the hypergraph ErdÅs--Rogers function \(f^{(k)}_{s,t}(n)\) is the largest integer \(m\) such that every \(n\)-vertex \(K_t^{(k)}\)-free \(k\)-graph cont…
math.CO2026
Sharper Ramsey lower bounds from refined Gaussian estimates
Qizhong Lin, Lin Niu
Recently, Ma, Shen and Xie broke the ErdÅs barrier for off-diagonal Ramsey numbers , achieving the first exponential improvement over the classical lower bound for…