
arXiv: 1601.04034
AbstractWe show that for every there exists C > 0 such that if then asymptotically almost surely the random graph contains the kth power of a Hamilton cycle. This determines the threshold for appearance of the square of a Hamilton cycle up to the logarithmic factor, improving a result of Kühn and Osthus. Moreover, our proof provides a randomized quasi‐polynomial algorithm for finding such powers of cycles. Using similar ideas, we also give a randomized quasi‐polynomial algorithm for finding a tight Hamilton cycle in the random k‐uniform hypergraph for . The proofs are based on the absorbing method and follow the strategy of Kühn and Osthus, and Allen et al. The new ingredient is a general Connecting Lemma which allows us to connect tuples of vertices using arbitrary structures at a nearly optimal value of p. Both the Connecting Lemma and its proof, which is based on Janson's inequality and a greedy embedding strategy, might be of independent interest.
Eulerian and Hamiltonian graphs, Applied Mathematics, General Mathematics, Random graphs (graph-theoretic aspects), Hypergraphs, Computer Graphics and Computer-Aided Design, absorbing method, FOS: Mathematics, Mathematics - Combinatorics, Combinatorics (math.CO), Paths and cycles, Hamilton cycles, Software, random graphs
Eulerian and Hamiltonian graphs, Applied Mathematics, General Mathematics, Random graphs (graph-theoretic aspects), Hypergraphs, Computer Graphics and Computer-Aided Design, absorbing method, FOS: Mathematics, Mathematics - Combinatorics, Combinatorics (math.CO), Paths and cycles, Hamilton cycles, Software, random graphs
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