2 papers
math.LO2019
Destroying Saturation while Preserving Presaturation at an Inaccessible; an Iterated Forcing Argument
Noah Schoem
We prove that a large class of presaturated ideals at inaccessible cardinals can be de-saturated while preserving their presaturation, answering both a question of Foreman and of C…
math.CO2013
Properties of Full-Flag Johnson Graphs
Irving Dai, Michael Greenberg, Noah Schoem +1
We introduce and study a variant of the family of Johnson graphs, the Full-Flag Johnson graphs. We show that Full-Flag Johnson graphs are Cayley graphs on S_n generated by certain…