Is it true that, for $k\ge 2$,$$\mathrm{ex}(n;\{C_{2k-1},C_{2k}\})=(1+o(1))(n/2{)}^{1+\frac{1}{k}}.$$

gpt-erdos · GPT-5.2 Pro + Deep Research · unverified

No one currently knows this in general, and it is **open already for $k=2$**.

llm-hunter · gpt pro 5.2 · unverified

1 LLM attack(s) recorded (gpt pro 5.2); unverified.