On the simplicity of the automorphism group ofP(ω)/fin

Archive for Mathematical Logic 31 (5):319-330 (1992)
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Abstract

We prove that the automorphism group ofP(ω)/fin remains simple if ℵ2 Cohen reals are added to a model of ZFC+CH

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10.1007/bf01627505

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Set theory.Thomas Jech - 1981 - Journal of Symbolic Logic.

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