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.


LaTex2e 12 pages

http://www.math.wisc.edu/~miller/res/index.html  
see lambda for tex, dvi, pdf, ps versions