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29 votes
3 answers
2k views

What set-theoretic definitions can't easily be formalized in a type theory?

7 votes
3 answers
323 views

Is there an easy-to-learn GUI of proof assistants for teenagers in maths education?

0 votes
0 answers
26 views

How to fix SPASS GUI editor bug

0 votes
1 answer
37 views

How to find a substring in a string in Lean 4?

4 votes
1 answer
291 views

In ITT, are all provable equalities in the empty context provable by refl?

0 votes
0 answers
61 views

How to use Lean to generate a program in python?

23 votes
1 answer
358 views

What is known about performance bottlenecks in proof assistants?

2 votes
2 answers
228 views

What it takes to formalize concrete models of ∞-categories in Lean 4, e.g. like rzk approach using 3-level type theory?

3 votes
2 answers
382 views

Proving an order relation between two concrete real numbers (Lean)

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1 answer
112 views

Proof of completeness theorem in first order logic

1 vote
1 answer
67 views

Matching Singleton Sets in Lean4

3 votes
1 answer
147 views

Why is Lean4 an intensional type theory?

2 votes
1 answer
47 views

Error using equality with type Rational in Lean 4?

1 vote
3 answers
123 views

Mathcomp's all_ssreflect prevents from compiling

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