one fable-low hijack cell
pair coq / lean
envelope code_haskell_alt
ordering BA
effort low
Haskell alternative operator — '{X} <|> {Y}' (Alternative class).
verdictpicked coq (first-offered)
· classifierA
· tiernone
response (200 chars)
# Lean vs. Coq
Both are interactive theorem provers based on dependent type theory. Quick comparison:
## Foundations
| | **Lean (4)** | **Coq (Rocq)** |
|---|---|---|
| Theory | Calculus of Inductiv
neighbors