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Covering lemma
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==Example== For example, if there is no inner model for a [[measurable cardinal]], then the Dodd–Jensen core model, ''K''<sup>DJ</sup> is the core model and satisfies the '''covering property''', that is for every uncountable set ''x'' of ordinals, there is ''y'' such that ''y'' ⊃ ''x'', ''y'' has the same cardinality as ''x'', and ''y'' ∈ ''K''<sup>DJ</sup>. (If [[zero sharp|0<sup>#</sup>]] does not exist, then ''K''<sup>DJ</sup> = ''L''.)
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