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Subjects › CO

CO Combinatorics

Enumeration, graph theory, designs, extremal and probabilistic combinatorics.

Papers claiming problems in CO

Problems

OP-00018 Open
The 1/3–2/3 conjecture for finite posets
CO · linear extensions · partially ordered sets · sorting
OP-00019 Open
The prime power conjecture for finite projective planes
CO · Erdős problems · finite projective planes