@JDHamkins

Mathematics and philosophy of the infinite. Professor of Logic @NotreDame @UniofOxford #ProofandtheArt #PhilMaths #InfinitelyMore #BookOfInfinity

 University of Notre Dame
buymeacoffee.com/joeldavidhamkins
Joined November 2015
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I am very pleased to announce that The Book of Infinity is available for pre-order! All my favorite paradoxes and conundrums. #BookOfInfinity #InfinitelyMore
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New paper is out, joint with Atticus Stonestorm. I first met Atticus in Oxford years ago, when he was an undergrad there, but he is now a math PhD student at Notre Dame, finishing up under Anand Pillay. We worked together on this interesting project, which has come to fruition. jdh.hamkins.org/pattern-of-c…

The pattern of consistency strength for membership in a computably enumerable set

Joel David Hamkins and Atticus Stonestrom, “The pattern of consistency strength for membership in a computably enumerable set,” preprint. arxiv:2610.24919. Abstract. Every computable pr…

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Today's talk at CUNY for the NYC Math Communication Seminar: Epistemic Logic Puzzles for Mathematicians! jdh.hamkins.org/epistemic-lo…

Epistemic Logic Puzzles for Mathematicians, NYC Math Education and Communication Seminar, October...

This will be a talk for the NYC Math Education and Communication Seminar, 20 October 2026, 12:15 – 1:15pm, at the CUNY Graduate Center in midtown Manhattan. Epistemic Logic Puzzles for Mathem…

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Joel David Hamkins retweeted
Avery Carr@ATCarrMathOct 19
Interesting take from our celebrated logician @JDHamkins … if we altered the rules of chess where we forgo check and checkmate and actually have to capture the king, will the game be the same? Intuitively, we might say of course. Not so fast. Find out below 👇.
Joel David Hamkins
@JDHamkinsOct 19
open.substack.com/pub/joelda…
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Back in the city. Giving 7 talks this week (!).
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This is the view looking towards the 59th Street Bridge. You can as also see the skytram to Roosevelt Island.
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Every game of chess ends prematurely

Why do we play chess for checkmate instead of playing more naturally to capture the enemy king? Would it be game-theoretically equivalent? Surprisingly, no, the two ways of playing are not equivalent.

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Replying to @JDHamkins
Who wants to start a Standard Forepreantepenultimate Chess league with me? Our anthem is Take 5 by the Dave Brubeck Quartet.
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Penultimate chess: mocking the standard chess checkmate rules. #InfinitelyMore open.substack.com/pub/joelda…

Every game of chess ends prematurely

Why do we play chess for checkmate instead of playing more naturally to capture the enemy king? Would it be game-theoretically equivalent? Surprisingly, no, the two ways of playing are not equivalent.

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Joel David Hamkins retweeted
Amazing Maps
@amazingmapOct 16
The largest page Adobe Acrobat allows in a PDF is about 381 km across.
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A delightful article from mathematician Joel Hamkins! Written with clarity, depth, and a subtle whimsy. It inspired me to finally become a paid subscriber to his Substack. In a way, his writing reminds me of Damon Runyon (viewed at a certain level of abstraction) in that it juxtaposes formality with delight.
Joel David Hamkins
@JDHamkinsOct 16
open.substack.com/pub/joelda…

Every game of chess ends prematurely

Why do we play chess for checkmate instead of playing more naturally to capture the enemy king? Would it be game-theoretically equivalent? Surprisingly, no, the two ways of playing are not equivalent.

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open.substack.com/pub/joelda…

Every game of chess ends prematurely

Why do we play chess for checkmate instead of playing more naturally to capture the enemy king? Would it be game-theoretically equivalent? Surprisingly, no, the two ways of playing are not equivalent.

infinitelymore.xyz
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infinitelymore.xyz/p/chess-g… #InfinitelyMore #FrivolitiesOfTheGods

Every game of chess ends prematurely

Why do we play chess for checkmate instead of playing more naturally to capture the enemy king? Would it be game-theoretically equivalent? Surprisingly, no, the two ways of playing are not equivalent.

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Now updated with a position that is winning for Black in standard chess, but losing in natural chess. Black has just played Qd2#.
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Joel David Hamkins retweeted
Lake Michigan@LakeMichigan13Oct 14
Spotlight on Chambers Island this morning. It has islands on a lake on an island on a lake 🌊🌊
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I'm giving several talks next week in New York: - Tuesday: NYC Math Ed & Communication seminar - Friday: CUNY Logic Workshop - Friday: CUNY Graduate Student Logic Seminar In addition, I shall be recording four additional lectures in the ERGO studios for my Lectures on Infinity series. Links below.
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jdh.hamkins.org/fundamental-…

On the fundamental theorem of finite games, CUNY Student Logic Seminar, October 2026

This will be a talk for the CUNY Student Logic Seminar on 23rd October 2026, 5pm at the CUNY Graduate Center in midtown Manhattan. On the fundamental theorem of finite games Abstract: We will give …

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ergo.org/courses/lectures-on…

Lectures on Infinity — Ergo

Joel David Hamkins guides viewers through the great paradoxes and discoveries about infinity, from Zeno's ancient puzzles to Cantor's revolutionary proof that some infinities are larger than others.

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