Mathematics – Combinatorics
Scientific paper
2009-09-02
Mathematics
Combinatorics
13 pages, 4 figures
Scientific paper
Albertson conjectured that if a graph $G$ has chromatic number $r$ then its
crossing number is at least as much as the crossing number of $K_r$. Albertson,
Cranston, and Fox verified the conjecture for $r\le 12$. We prove the statement
for $r\le 16$.
Barát János
Tóth Géza
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