On lambda-prime-sets
Arnold W. Miller
Abstract
A subset X of the Cantor space, 2^\omega, is a lambda-prime-set iff
for every countable subset Y of the Cantor space Y is relatively G-delta
in X union Y. In this paper we prove two forcing results about
lambda-prime-sets. First we show that it is consistent that every
lambda-prime-set is a gamma-set. Secondly we show that is independent
whether or not every dagger-lambda-set is a lambda-prime-set.
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