IDEAL INDEPENDENT FAMILIES AND THE ULTRAFILTER NUMBER

We say that $\mathcal {I}$ is an ideal independent family if no element of ${\mathcal {I}}$ is a subset mod finite of a union of finitely many other elements of ${\mathcal {I}}.$ We will show that the minimum size of a maximal ideal independent family is consistently bigger than both $\mathfrak {d}$...

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Veröffentlicht in:	The Journal of symbolic logic 2021-03, Vol.86 (1), p.128-136
Hauptverfasser:	CANCINO, JONATHAN, GUZMÁN, OSVALDO, MILLER, ARNOLD W.
Format:	Artikel
Sprache:	eng
Schlagworte:	Logic Mathematics Philosophy
Online-Zugang:	Volltext
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