H+-EIGENVALUES OF LAPLACIAN AND SIGNLESS LAPLACIAN TENSORS

We propose a simple and natural definition for the Laplacian and the signless Laplacian tensors of a uniform hypergraph. We study their H+-eigenvalues, i.e., H-eigenvalues with non-negative H-eigenvectors, and H++-eigenvalues, i.e., H-eigenvalues with positive H-eigenvectors. We show that each of the Laplacian tensor, the signless Laplacian tensor, and the adjacency tensor has at most one H++-eigenvalue, but has several other H+-eigenvalues. We identify their largest and smallest H+-eigenvalues, and establish some maximum and minimum properties of these H+-eigenvalues. We then define analytic connectivity of a uniform hypergraph and discuss its application in edge connectivity.