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math.GN2025
Characterizing -syndetic, -thick, and related notions of size using derived sets along ultrafilters
Shea D. Burns, Dennis Davenport, Shakuan Frankson +3
We characterize relative notions of syndetic and thick sets using, what we call, "derived" sets along ultrafilters. Manipulations of derived sets is a characteristic feature of alg…
math.GN2024
A characterization of piecewise -syndetic sets
Conner Griffin
Some filter relative notions of size, -syndeticity and piecewise -syndeticity, were defined and applied with clarity and focus…