Topological entropies of equivalent smooth flows

Wenxiang Sun, Todd Young, Yunhua Zhou
2009 Transactions of the American Mathematical Society  
We construct two equivalent smooth flows, one of which has positive topological entropy and the other has zero topological entropy. This provides a negative answer to a problem posed by Ohno.
doi:10.1090/s0002-9947-08-04743-0 fatcat:lxwddkl4t5esdlekfw76vzkbji