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1. CJM 2009 (vol 61 pp. 604)
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First Countable Continua and Proper Forcing Assuming the Continuum Hypothesis,
there is a compact, first countable, connected space of weight $\aleph_1$
with no totally disconnected perfect subsets.
Each such space, however, may be destroyed by
some proper forcing order which does not add reals.
Keywords:connected space, Continuum Hypothesis, proper forcing, irreducible map Categories:54D05, 03E35 |