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math.CO2020
Note on Sunflowers
Tolson Bell, Suchakree Chueluecha, Lutz Warnke
A sunflower with p petals consists of p sets whose pairwise intersections are identical. The goal of the sunflower problem is to find the smallest r=r(p,k) such that any family of…
math.CO2019★ 22 cited
On Wormald's differential equation method
Lutz Warnke
This note contains a short and simple proof of Wormald's differential equation method (that yields slightly improved approximation guarantees and error probabilities). This powerfu…
math.CO2018
Large girth approximate Steiner triple systems
Tom Bohman, Lutz Warnke
In 1973 Erdos asked whether there are n-vertex partial Steiner triple systems with arbitrary high girth and quadratically many triples. (Here girth is defined as the smallest integ…