Mark Ellingham

File:Ellingham-Horton 54-graph.svgs]]

Mark Norman Ellingham is a professor of mathematics at Vanderbilt University whose research concerns graph theory.[http://as.vanderbilt.edu/math/bio/mark-ellingham Faculty profile], Vanderbilt U. Mathematics, retrieved 2015-02-10. With Joseph D. Horton, he is the discoverer and namesake of the Ellingham–Horton graphs, two cubic 3-vertex-connected bipartite graphs that have no Hamiltonian cycle.{{citation|title=Eulerian Graphs and Related Topics, Part 1, Volume 1|volume=45|series=Annals of Discrete Mathematics|last=Fleischner|first=Herbert|publisher=North-Holland|year=1990|isbn=9780080867854|pages=111–112|url=https://books.google.com/books?id=Y9e4ASBxNBwC&pg=PA112}}.

Ellingham earned his Ph.D. in 1986 from the University of Waterloo under the supervision of Lawrence Bruce Richmond.{{mathgenealogy|id=40993}} In 2012, he became one of the inaugural fellows of the American Mathematical Society.[http://www.ams.org/profession/fellows-list List of Fellows of the American Mathematical Society], retrieved 2015-02-10.{{citation|url=http://news.vanderbilt.edu/2012/11/american-mathematical-society/|title=Eight VU mathematicians elected to American Mathematical Society|first=David|last=Salisbury|date=November 9, 2012|journal=Vanderbilt Research News}}