most citedStrongly Summable Ultrafilters, Union Ultrafilters, and the Trivial Sums Property

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math.LO2013★ 2 cited

Strongly Summable Ultrafilters, Union Ultrafilters, and the Trivial Sums Property

David J. Fernández Bretón

We answer two questions of Hindman, Steprāns and Strauss, namely we prove that every strongly summable ultrafilter on an abelian group is sparse and has the trivial sums property.…