3 citations · 3 across the 2 of their papers we have counts for
3 papers
math.LO2013
On rapid idempotent ultrafilters
Peter Krautzberger
This short note contains the proofs of two small but somewhat surprising results about ultrafilters on : 1. strongly summable ultrafilters are rapid, 2. every rapid ult…
math.LO2010
On union ultrafilters
Peter Krautzberger
We present some new results on union ultrafilters. We characterize stability for union ultrafilters and, as the main result, we construct a new kind of unordered union ultrafilter.
math.LO2010★ 3 cited
On strongly summable ultrafilters
Peter Krautzberger
We present some new results on strongly summable ultrafilters. As the main result, we extend a theorem by N. Hindman and D. Strauss on writing strongly summable ultrafilters as sum…