The cover time of a biased random walk on a random regular graph of odd degree
(1805.05780)Abstract
We consider a random walk process which prefers to visit previously unvisited edges, on the random $r$-regular graph $Gr$ for any odd $r\geq 3$. We show that this random walk process has asymptotic vertex and edge cover times $\frac{1}{r-2}n\log n$ and $\frac{r}{2(r-2)}n\log n$, respectively, generalizing the result from Cooper, Frieze and Johansson from $r = 3$ to any larger odd $r$. This completes the study of the vertex cover time for fixed $r\geq 3$, with Berenbrink, Cooper and Friedetzky having previously shown that $Gr$ has vertex cover time asymptotic to $\frac{rn}{2}$ when $r\geq 4$ is even.
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