A Reduction in Consistency Strength for Universal Indestructibility
Tom 55 / 2007
Bulletin Polish Acad. Sci. Math. 55 (2007), 1-6
MSC: 03E35, 03E55.
DOI: 10.4064/ba55-1-1
Streszczenie
We show how to reduce the assumptions in consistency strength used to prove several theorems on universal indestructibility.