Elphick, Clive

• The Electronic Journal of Combinatorics Volume 20, Issue 3 (2013) - Papers
  New Spectral Bounds on the Chromatic Number Encompassing all Eigenvalues of the Adjacency Matrix
  Abstract  PDF  new spectral bounds  official source
• The Electronic Journal of Combinatorics Volume 24, Issue 1 (2017) - Papers
  An Inertial Lower Bound for the Chromatic Number of a Graph
  Abstract  PDF  An Inertial Lower Bound for the Chromatic Number of a Graph  Official Source
• The Electronic Journal of Combinatorics Volume 26, Issue 3 (2019) - Papers
  Spectral Lower Bounds for the Orthogonal and Projective Ranks of a Graph
  Abstract  PDF