Trump temporarily drops tariffs to 10% for most countries



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Show HN: Formalizing Principia Mathematica using Lean

This project aims to formalize the first volume of Prof. Bertrand Russell’s Principia Mathematica using the Lean theorem prover. Throughout the formalization, I tried to rigorously follow Prof. Ru

25 apr 2025, 20:30:10 | Hacker news