Ben Barber, Daniela Kühn, Allan Lo, Richard Montgomery and Deryk Osthus, Journal of Combinatorial Theory, Series B, Volume 127, November 2017, Pages 148–186 PDF
Together with Daniela Kühn, Allan Lo and Deryk Osthus I proved that for every graph 
there is a constant 
such that every “-divisible” graph 
on 
vertices with minimum degree at least 
has an -decomposition. In practice, the current obstacle to improving the bounds on 
is usually our knowledge of another quantity, the fractional decomposition threshold for cliques.
A graph has a fractional -decomposition if we can assign a non-negative weight to each copy of in such that the total weight of the copies of containing each fixed edge of is exactly 1. We prove that every graph with minimum degree at least 
has a fractional 
-decomposition. This greatly improves the previous bound of 
for large 
. We also prove a similar result for hypergraphs.
The proof begins with an approximate fractional -decomposition obtained by weighting every -clique in our graph equally. We then use small gadgets to make local adjustments to the total weight over each edge until we end up with a genuine fractional -decomposition.