Sharp bounds for ordinary and signless Laplacian spectral radii of   uniform hypergraphs
  We give sharp upper bounds for the ordinary spectral radius and signless Laplacian spectral radius of a uniform hypergraph in terms of the average $2$-degrees or degrees of vertices, respectively, and we also give a lower bound for the ordinary spectral radius. We also compare these bounds with known ones. 
Hongying Lin, Biao Mo, Bo Zhou, Weiming Weng
math.CO