Transitive Flows on Two-Dimensional Manifolds

A flow O = {<frt\\teU} on a space M is strongly transitive provided that there is a dense Gs set G in M such that for each p in G the trajectory of p, T(p) = {0,(/>)|f e R} is dense in both time directions in M. In this case, we shall say that the space M is admissible. Thus, for example, the torus is admissible because the irrational flow [8]

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