Vladi Ivanov

Exhaustive Nonexistence of Circulant Ramsey(5,5;42/43) Colorings and Exploratory Symmetry-Constrained Search

We exhaustively exclude ordinary circulant Ramsey(5,5;42) and Ramsey(5,5;43) colorings. We also report exploratory symmetry-constrained and unconstrained tabu searches. Values 84 for K42 and 129 for K43 are the best values produced by the stated runs, not literature records or pr...

Exhaustive Nonexistence of Circulant Ramsey(5,5;42/43) Colorings and Exploratory Symmetry-Constrained Search

We exhaustively exclude ordinary circulant Ramsey(5,5;42) and Ramsey(5,5;43) colorings. We also report exploratory symmetry-constrained and unconstrained tabu searches. Values 84 for K42 and 129 for K43 are the best values produced by the stated runs, not literature records or pr...