Abstract
Let f be a self-continuous map of a graph G. Let P(f) and R(f) denote the sets of periodic points and recurrent points respectively. We say that the map f is relatively recurrent if R(f) = G. In this paper, it is shown that f is relatively recurrent if and only if one of the following statements holds: (a) G is a circle and f is a homeomorphism topologically conjugate to an irrational rotation of the unit circle S 1 ; (b) P(f) = G. Part (b) extends a result of Blokh.
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