Co-re set with no infinite r.e. subset

From: Daryl McCullough (daryl_at_atc-nycorp.com)
Date: 09/07/04 

Date: 7 Sep 2004 03:51:11 -0700

Is there an easy example of an infinite set of naturals that has no infinite
r.e. subset? It would be better if it were co-r.e., but any example would
be nice. Thanks. 

--
Daryl McCullough
Ithaca, NY
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