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arxiv: 1605.04087 · v1 · pith:RAXZ4JO7new · submitted 2016-05-13 · 🧮 math.GN · math.LO

Every filter is homeomorphic to its square

classification 🧮 math.GN math.LO
keywords everyfilterhomeomorphicmathcalomegaborelengelenfilters
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We show that every filter $\mathcal{F}$ on $\omega$, viewed as a subspace of $2^\omega$, is homeomorphic to $\mathcal{F}^2$. This generalizes a theorem of van Engelen, who proved that this holds for Borel filters.

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