ON THE SET OF PERIODS FOR a MAPS
نویسندگان
چکیده
Let a be the topological graph shaped like the letter o . We denote by 0 the unique branching point of a , and by O and I the closures of the components of a \ {0} homeomorphics to the circle and the interval, respectively. A continuous map from a into itself satisfying that / has a fixed point in O, or / has a fixed point and /(0) € I is called a a map. These are the continuous self-maps of a whose sets of periods can be studied without the notion of rotation interval. We characterize the sets of periods of all a maps.
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