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On Union Ultrafilters

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Abstract

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.

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Authors and Affiliations

  1. Mathematics Department, University of Michigan, Ann Arbor, MI, USA

    Peter Krautzberger

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  1. Peter Krautzberger
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Correspondence to Peter Krautzberger.

Additional information

Peter Krautzberger was partially supported by DFG-grant KR 3818.

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Krautzberger, P. On Union Ultrafilters. Order 29, 317–343 (2012). https://doi.org/10.1007/s11083-011-9223-3

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  • DOI: https://doi.org/10.1007/s11083-011-9223-3

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