2 problems

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Chung–Graham conjecture on bipartite multicolor Ramsey growth
Chung–Graham conjecture. The lower bound is asymptotically sharp for $a=s$ and $b=t$ .
Conjectureopenbipartite-ramsey extremal-combinatoricsarXiv posted 2 days ago
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Conjecture on the quadratic threshold for bipartite Ramsey growth
Quadratic-threshold conjecture.
Conjectureopenbipartite-ramsey extremal-combinatoricsarXiv posted 2 days ago

Chung–Graham conjecture on bipartite multicolor Ramsey growth