Hamilton cycles in weighted Erdős-Rényi graphs
Abstract
Given a symmetric $n\times n$ matrix $P$ with $0 \le P(u, v)\le 1$, we define a random graph $G_{n, P}$ on $[n]$ by independently including any edge $\{u, v\}$ with probability $P(u, v)$. For $k\ge 1$ let $\mathcal{A}_k$ be the property of containing $\lfloor k/2 \rfloor$ Hamilton cycles, and one perfect matching if $k$ is odd, all edge-disjoint. With an eigenvalue condition on $P$, and conditions on its row sums, $G_{n, P}\in \mathcal{A}_k$ happens with high probability if and only if $G_{n, P}$ has minimum degree $k$ whp. We also provide a hitting time version. As a special case, the random graph process on pseudorandom $(n, d, \mu)$-graphs with $\mu \le d(d/n)^\alpha$ for some constant $\alpha > 0$ has property $\mathcal{A}_k$ as soon as it acquires minimum degree $k$ with high probability.
- Publication:
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arXiv e-prints
- Pub Date:
- December 2020
- DOI:
- 10.48550/arXiv.2012.11953
- arXiv:
- arXiv:2012.11953
- Bibcode:
- 2020arXiv201211953J
- Keywords:
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- Mathematics - Combinatorics