The strict inequality between the largest Laplacian H-eigenvalue and spectral radius

Let GG be a connected non-odd-bipartite hypergraph. Here, ρL(G)\rho^{\mathcal{L}}(G) denotes the spectral radius of the Laplacian tensor of GG, and λmaxL(G)\lambda_{\max}^{\mathcal{L}}(G) denotes its largest H-eigenvalue.

Strict inequality conjecture.

λmaxL(G)<ρL(G).\lambda_{\max}^{\mathcal{L}}(G)<\rho^{\mathcal{L}}(G).

The preceding results establish this inequality for the generalized power hypergraphs considered in the paper in the relevant cases, but the conjecture remains open for connected non-odd-bipartite hypergraphs in general.

Sources & referencesView supporting material

Primary source

Yi-Zheng Fan, Murad-ul-Islam Khan and Ying-Ying Tan, “The largest H-eigenvalue and spectral radius of Laplacian tensor of non-odd-bipartite generalized power hypergraphs”, arXiv:1510.02178 (2015).

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