Joel David Hamkins

jdh.hamkins.org

mathematics and philosophy of the infinite

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The lattice of sets of natural numbers is rich (2021)

2026111 points26 comments Math & Algorithms details

$\newcommand\of{\subseteq}\newcommand\N{\mathbb{N}}\newcommand\R{\mathbb{R}}\def\<#1>{\left\langle#1\right\rangle}\newcommand\Z{\mathbb{Z}}\newcommand\Q{\mathbb{Q}}\newcommand\ltomega{{{<}…