### 理学院2019-2020学年秋季第六周学术报告（1）

We also prove the conjecture for n = 4^k for all k>0. These results imply that $\lim \frac{F(n)}{{n\choose 3}}=0.4$, and determine the unique limit object.
In the proof we use flag algebras combined with stability arguments.
Joint work with József Balogh, Bernard Lidicky, Florian Pfender, Jan Volec and Michael Young.