My Oxford student Emma Palmer and I have been thinking about worldly cardinals and Gödel-Bernays GBC set theory, and we recently came to a new realization. Namely, every worldly cardinal $\kappa$ a…

Joel David Hamkins

11.01.2025

The Human Podcast: 10 questions in 10 minutes | Joel David Hamkins

I had an enjoyable little discussion with Joe Murray of The Human Podcast, part of his new series, called 10 questions in 10 minutes, in which he asks his interview subjects for short answers to te…

Joel David Hamkins

22.01.2025

The covering reflection principle – Oberwolfach January 2025 | Joel David Hamkins

This was a talk I gave at the Set Theory Workshop at the Mathematisches Forschungsinstitut in Oberwolfach, Germany, 12-17 January 2025. Abstract. The principle of covering reflection holds of a car…

Joel David Hamkins

29.01.2025

On Skolem’s paradox and the transitive submodel theorem, Rust Belt Workshop in the Philosophy of Logic, Language, and Mathematics, February 2025 | Joel David Hamkins

This will be a talk for the Rust Belt Workshop in the Philosophy of Logic, Language, and Mathematics, held at Ohio State University in Columbus, Ohio, February 8-9, 2025, University Hall (230 N Ova…

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Joel David Hamkins

Science

Every worldly cardinal admits a Gödel-Bernays structure | Joel David Hamkins

The Human Podcast: 10 questions in 10 minutes | Joel David Hamkins

The covering reflection principle – Oberwolfach January 2025 | Joel David Hamkins

On Skolem’s paradox and the transitive submodel theorem, Rust Belt Workshop in the Philosophy of Logic, Language, and Mathematics, February 2025 | Joel David Hamkins

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Joel David Hamkins