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In this paper, we study some extremal problems of three kinds of spectral radii of $$k$$ k -uniform hypergraphs (the adjacency spectral radius, the signless Laplacian spectral radius and the incidence $$Q$$ Q -spectral radius). We call a connected and acyclic $$k$$ k -uniform hypergraph a supertree. We introduce the operation of “moving edges” for hypergraphs, together with...
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