activity
20052012
most citedCombinatorial and model-theoretical principles related to regularity of ultrafilters and compactness of topological spaces. III

3 citations · 7 across the 17 of their papers we have counts for

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Showing 2006 · math.LOShow all

2 papers · 2 filters

math.LO2006

A connection between decomposable ultrafilters and possible cofinalities. II

Paolo Lipparini

We use Shelah's theory of possible cofinalities in order to solve a problem about ultrafilters. THEOREM. Suppose that is a singular cardinal, , and the ultrafilter $D…

math.LO2006★ 1 cited

A connection between decomposability of ultrafilters and possible cofinalities

Paolo Lipparini

We introduce the decomposability spectrum of an ultrafilter , and show that Shelah's $\pcf$ theory influences the possible v…