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# Two Small Examples by Fields Medallists
[https://lawrencecpaulson.github.io/2024/02/28/Gowers_bijection_example.html](https://lawrencecpaulson.github.io/2024/02/28/Gowers_bijection_example.html)
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# Integrating Zermelo-Fraenkel set theory with higher-order logic
[https://lawrencecpaulson.github.io/2022/04/06/ZFC_in_HOL.html](https://lawrencecpaulson.github.io/2022/04/06/ZFC_in_HOL.html)
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Is it possible to translate Coq to Isabelle using Dedukti?
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Can you help me find, in ZF or IzarMathLib the definition of the natural numbers "3,4,5,6,7,8,9,10" (using _succ_)?
I already found "1" and "2" in ZF.Bool.thy
```
abbreviation
one () where
…
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# The semantics of a simple functional language
[https://lawrencecpaulson.github.io/2023/03/08/Fun_Semantics.html](https://lawrencecpaulson.github.io/2023/03/08/Fun_Semantics.html)
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# When is a computer proof a proof?
[https://lawrencecpaulson.github.io/2023/08/09/computer_proof.html](https://lawrencecpaulson.github.io/2023/08/09/computer_proof.html)
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# Machine Logic
[https://lawrencecpaulson.github.io/2022/03/16/Types_vs_Sets.html](https://lawrencecpaulson.github.io/2022/03/16/Types_vs_Sets.html)
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Prove Gödel's Incompleteness Theorem (metamath 100 #6). 4 other formalization tools have done so.
Mario: Model theory. So many ways to do this one, and all of them require a lot of preparation and …
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@SKolodynski I tried to create a subgroup locale and show
```isabelle
group0 H "restrict(P,H\H)"
```
but it would not work as `groper` is defined without limitation on the elements you are operati…
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# Project - Indexing existing Abstract Models (2024-2025?)
*Once a proper interface for Rays is setup, one of the things I'd like to do with it, is to point it to a lot of existing abstract models of…