Dear organizers and participants,
I will present a paper:
Frédéric Havet, Stéphan Thomassé:
Median orders of tournaments: a tool for the second neighbourhood
problem and Sumner's conjecture.
No prerequisites, no additional knowledge needed.
Authors show a nice inductive tool for digraph problems and proove
some (previously known) theorems about digraphs in a simple way.
Best,
Dusan