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Download fileSingular cardinals and strong extenders
journal contribution
posted on 2012-06-01, 00:00 authored by Arthur W. Apter, James CummingsJames Cummings, Joel David HamkinsWe investigate the circumstances under which there exist a singular cardinal µ and a short (κ,µ)-extender E witnessing “κ is µ-strong”, such that µ is singular in Ult(V, E)