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WEAK REFLECTION AT THE SUCCESSOR OF A SINGULAR CARDINAL
Published online by Cambridge University Press: 25 March 2003
Abstract
The notion of stationary reflection is one of the most important notions of combinatorial set theory. Weak reflection, which is, as its name suggests, a weak version of stationary reflection, is investigated. The main result is that modulo a large cardinal assumption close to 2-hugeness, there can be a regular cardinal $\kappa$ such that the first cardinal weakly reflecting at $\kappa$ is the successor of a singular cardinal. This answers a question of Cummings, Džamonja and Shelah.
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- The London Mathematical Society, 2003
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