• Counterexamples to a Conjecture of Harris on Hall Ratio 

      Autor: Blumenthal A.; Lidický B.; Martin R.R.; Norin S.; Pfender F.; Volec J.
      (SIAM, 2022)
      In this work, we refute a conjecture of Harris by constructing various graphs whose fractional chromatic number grows much faster than their Hall ratio. The Hall ratio of a graph G is the maximum value of the ratio between ...