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Hi @Vtec234 @gebner !
I've published a new [VSCode extension for code actions](https://marketplace.visualstudio.com/items?itemName=denis-gorbachev.lean4-code-actions&ssr=false).
Mario suggested …
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Hello! For a competition, I want to use tools that are far outside those that are normally used, say for the most recent math-like competition, including [LEAN](https://github.com/leanprover/lean4) an…
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When I clone the [GameSkeleton template](https://github.com/hhu-adam/GameSkeleton) and then start a Dev Container in Vs Code, I get the following error:
```
> lean4-game@0.1.0 start
> concurrentl…
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### Prerequisites
Please put an X between the brackets as you perform the following steps:
* [X] Check that your issue is not already filed:
https://github.com/leanprover/lean4/issues
* …
fonqL updated
3 weeks ago
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Lean (version 4.4.0, commit ca7d6dadb9e1, Release)
lean4-mode commit: d1c9364
GNU Emacs 28.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.20, cairo version 1.16.0) of 2022-05-31
```
Debugger…
Yuhta updated
5 months ago
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GetElemがあるなら GetElem? があってもいい気がする
作れないのか?自作できるだろうか
```lean
variable {α : Type} (A : α)
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failed to synthesize
GetElem? α Nat ?m.606 ?m.607
use `set_option diagnostics true` to get diagno…
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simp 属性は削除できるが,他の属性は削除できないこともある.いつ削除できるのか?どうやって判定するのか?
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### Language name
Lean
### Language version
4
### Language homepage
https://lean-lang.org/
### Compiler homepage
Binaries: https://github.com/leanprover/lean4/releases/latest, Build instruction…
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```
PS C:\Users\fruit\OneDrive\Desktop\Lean4Widgets> cd C:\Users\fruit\OneDrive\Desktop\Lean4Widgets\lean4-samples\RubiksCube
PS C:\Users\fruit\OneDrive\Desktop\Lean4Widgets\lean4-samples\RubiksCube…
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### Prerequisites
Please put an X between the brackets as you perform the following steps:
* [x] Check that your issue is not already filed:
https://github.com/leanprover/lean4/issues
* …