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Remarks on ultrafilters exponentiation

Lorenzo Luperi Baglini, Boris Šobot

math.LOarXiv:2610.16475

Abstract

Recently, two exponentiations of ultrafilters have been introduced in [7]. We rephrase them in nonstandard terms, and use the nonstandard formulations to characterize some of their properties. We also study their relations with divisibility by introducing factor-picking functions and highly exponential ultrafilters.

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