Full reflection of stationary sets at regular cardinals

Details Full reflection of stationary sets at regular cardinals Full reflection of stationary sets at regular cardinals

1992-04-15

arxiv.org/abs/math/9204218v1

Amer. J. Math. 115 (1993), 435-455

Mathematics

Logic

Scientific paper

A stationary subset S of a regular uncountable cardinal kappa reflects fully at regular cardinals if for every stationary set T subseteq kappa of higher order consisting of regular cardinals there exists an alpha in T such that S cap alpha is a stationary subset of alpha. We prove that the Axiom of Full Reflection which states that every stationary set reflects fully at regular cardinals, together with the existence of n-Mahlo cardinals is equiconsistent with the existence of Pi^1_n-indescribable cardinals. We also state the appropriate generalization for greatly Mahlo cardinals.

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