The extremal t-uniform unicyclic hypergraph on Estrada index

For a t-uniform hypergraph H = (V(H), E(H)), the Estrada index EE(H) of H is defined as Ei is an element of[n] e theta i, where theta 1, ... , theta n are the eigevalues of the adjacency matrix of H. In this paper, the extremal t-uniform unicylic hypergraph which has maximum Estrada index are characterized.