Article

Israel Journal of Mathematics

, Volume 65, Issue 2, pp 153-164

First online:

Countable dense homogeneous spaces under Martin’s axiom

  • Stewart BaldwinAffiliated withDepartment of Mathematics, Auburn University
  • , Robert E. BeaudoinAffiliated withDepartment of Mathematics, Auburn University

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Abstract

We show that Martin’s axiom for countable partial orders implies the existence of a countable dense homogeneous Bernstein subset of the reals. Using Martin’s axiom we derive a characterization of the countable dense homogeneous spaces among the separable metric spaces of cardinality less thanc. Also, we show that Martin’s axiom implies the existence of a subset of the Cantor set which isλ-dense homogeneous for everyλ <c.