AML
2005
13 years 11 months ago
2005
Under certain cardinal arithmetic assumptions, we prove that for every large enough regular cardinal, for many regular < , many stationary subsets of concentrating on cofinali...
APAL
2006
13 years 11 months ago
2006
We present a technique for destroying stationary subsets of P+ using partial square sequences. We combine this method with Gitik's poset for changing the cofinality of a cardi...
APAL
2007
13 years 11 months ago
2007
It is possible to control to a large extent, via semiproper forcing, the parameters (β0, β1) measuring the guessing density of the members of any given antichain of stationary s...