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An explicit compact universal space for real flows
Authors:Yonatan Gutman  Lei Jin
Institution:Institute of Mathematics, Polish Academy of Sciences, ul. ?niadeckich 8, 00-656 Warszawa, Poland
Abstract:The Kakutani–Bebutov Theorem (1968) states that any compact metric real flow whose fixed point set is homeomorphic to a subset of R embeds into the Bebutov flow, the R-shift on C(R,0,1]). An interesting fact is that this universal space is a function space. However, it is not compact, nor locally compact. We construct an explicit countable product of compact subspaces of the Bebutov flow which is a universal space for all compact metric real flows, with no restriction; namely, into which any compact metric real flow embeds. The result is compared to previously known universal spaces.
Keywords:37B05  54H20  Bebutov–Kakutani theorem  Compact metric flow  Bebutov flow  Bernstein space  Universal space  Equivariant embedding
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