Supported by Chinese Universities Scientic Fund(No.N140504004);the National Natural Science Foundation of China(No.11271116)
Frankl and Füredi in [1] conjectured that the r-graph with m edges formed by taking the first m sets in the colex ordering of N^(r) has the largest Lagrangian of all r-graphs with m edges.Denote this r-graph by Cr,...