A Lean companion to Analysis I
Browse cluster: Lean4 Formal Verification & Cryptography →This repository contains formalizations of textbooks on analysis into Lean, a proof assistant language. The main project formalizes "Analysis I," covering foundational mathematics from the natural numbers through limits of sequences, while a companion "Analysis/MeasureTheory" subdirectory formalizes "An Introduction to Measure Theory," addressing topics like Lebesgue measure, integration, and abstract measure spaces. The formalizations are authored by Terence Tao and designed to closely parallel the original textbooks while demonstrating Lean's features; they gradually transition from textbook-specific definitions to Mathlib (Lean's standard mathematics library) definitions as the material progresses, serving as both faithful companions to the texts and introductions to relevant portions of Mathlib.