Why ${\rm Ult}(V,{\cal U})\vDash|[id]_{\cal U}|<j_{\cal U}(\kappa)$, when $\cal U$ is a $\delta$-complete fine ultrafilter on $\cal P_\kappa(\alpha)$?

score 146 · Answer 14 · 2020-08-18 19:12:20

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$2^{\aleph_0} \geq \aleph_1$

Published on 18 Aug 2020 - 19:12

score 74 · Answer 15 · 2026-04-11 23:48:07

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Topology up to isomorphism

Published on 11 Apr 2026 - 23:48

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Why ${\rm Ult}(V,{\cal U})\vDash|[id]_{\cal U}|<j_{\cal U}(\kappa)$, when $\cal U$ is a $\delta$-complete fine ultrafilter on $\cal P_\kappa(\alpha)$?

$2^{\aleph_0} \geq \aleph_1$

Topology up to isomorphism

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