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Lean Grimoire

Back in July, I started experimenting with using modern coding agents to build a number of mathematical visualization applets.

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1Back in July, I started experimenting with using modern coding agents to build a number of…
2With the extremely hectic events of the last few months, I had to set those projects aside…
3The purpose of that textbook was to teach propositional and first-order logic in the form…

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Updates on my research and expository papers, discussion of open problems, and other maths-related topics. By Terence Tao

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Lean Grimoire

11 November, 2026 in diversions, math.LO | Tags: applets, Lean | by Terence Tao

Back in July, I started experimenting with using modern coding agents to build a number of mathematical visualization applets. With the extremely hectic events of the last few months, I had to set those projects aside; but I recently found a bit of time to work on one such project that I had started back then, which was to modernize a Javascript interactive textbook I had made back in 2018, entitled “QED”, and announced previously on this blog. The purpose of that textbook was to teach propositional and first-order logic in the form of a “crafting game”, where one applied various rules of logic to reach a desired conclusion from a given set of hypotheses.

With a coding agent, I rebuilt the game (which I have given the working title of “Lean Grimoire”) with a number of new features, for instance giving the option to show an in-progress Lean proof of one’s game state. Just for fun, I also added an option to play in a “fantasy mode” in which various game elements are depicted using fantasy-themed flavor text (for instance, mathematical statements become “potions”, mathematical expressions become “scrolls”, and so forth). Here is a typical screenshot, in which one has nearly completed the proof of the assertion $A \implies A \wedge B$ :

I would be interested in having some playtesting of this app to make it more useful as a means to teach logical proofs and/or Lean.

The Polymath Blog

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To enter in LaTeX in comments, use $latex <Your LaTeX code>$ (without the < and > signs, of course; in fact, these signs should be avoided as they can cause formatting errors). Also, backslashes \ need to be doubled as \\. See the about page for details and for other commenting policy.

« “Six Math Essentials” now available

Blog at WordPress.com.Ben Eastaugh and Chris Sternal-Johnson.

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기타Hacker News·1일 전·원문 약 5분

Lean Grimoire

Back in July, I started experimenting with using modern coding agents to build a number of mathematical visualization applets.

핵심 요약

자동 요약

1Back in July, I started experimenting with using modern coding agents to build a number of…
2With the extremely hectic events of the last few months, I had to set those projects aside…
3The purpose of that textbook was to teach propositional and first-order logic in the form…

원문 본문

출처 · Hacker News

What's new

Updates on my research and expository papers, discussion of open problems, and other maths-related topics. By Terence Tao

Subscribe to feed

Lean Grimoire

11 November, 2026 in diversions, math.LO | Tags: applets, Lean | by Terence Tao

Back in July, I started experimenting with using modern coding agents to build a number of mathematical visualization applets. With the extremely hectic events of the last few months, I had to set those projects aside; but I recently found a bit of time to work on one such project that I had started back then, which was to modernize a Javascript interactive textbook I had made back in 2018, entitled “QED”, and announced previously on this blog. The purpose of that textbook was to teach propositional and first-order logic in the form of a “crafting game”, where one applied various rules of logic to reach a desired conclusion from a given set of hypotheses.

With a coding agent, I rebuilt the game (which I have given the working title of “Lean Grimoire”) with a number of new features, for instance giving the option to show an in-progress Lean proof of one’s game state. Just for fun, I also added an option to play in a “fantasy mode” in which various game elements are depicted using fantasy-themed flavor text (for instance, mathematical statements become “potions”, mathematical expressions become “scrolls”, and so forth). Here is a typical screenshot, in which one has nearly completed the proof of the assertion $A \implies A \wedge B$ :

I would be interested in having some playtesting of this app to make it more useful as a means to teach logical proofs and/or Lean.

The Polymath Blog

For commenters

To enter in LaTeX in comments, use $latex <Your LaTeX code>$ (without the < and > signs, of course; in fact, these signs should be avoided as they can cause formatting errors). Also, backslashes \ need to be doubled as \\. See the about page for details and for other commenting policy.

« “Six Math Essentials” now available

Blog at WordPress.com.Ben Eastaugh and Chris Sternal-Johnson.

Subscribe to feed.

전체 내용이 궁금하다면

Hacker News 원문에서 이어 읽기

원문 보기

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비슷한 글

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Building TaskFamily: Shared Notes Beat Perfect Memory. What Worked, What Broke

Label created is not a scan: the tracking state most systems collapse too early

Before adding Plane labels, count what states and priorities already tell you

어떤 기술이 궁금하세요?

어떤 기술이 궁금하세요?

어떤 기술이 궁금하세요?

어떤 기술이 궁금하세요?

Lean Grimoire

핵심 요약

원문 본문

Lean Grimoire

Top Posts

Archives

Categories

The Polymath Blog

For commenters

비슷한 글

Praxis-1: A Developer's Checklist Before You Run an Open Robot Model on Your Hardware

What Two Forgotten Smart Plugs Taught Me About the Future of Software

Building TaskFamily: Shared Notes Beat Perfect Memory. What Worked, What Broke

Label created is not a scan: the tracking state most systems collapse too early

Before adding Plane labels, count what states and priorities already tell you

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