Synthetic Differential Geometry in Lean

Fuente: arXiv
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Main Authors: Brasca, Riccardo, Clemente, Gabriella
Format: Preprint
Published: 2026
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author Brasca, Riccardo
Clemente, Gabriella
author_facet Brasca, Riccardo
Clemente, Gabriella
contents This article is about the formalization of synthetic differential geometry with the Lean proof assistant and the mathematical library mathlib. The main result we prove and formalize is a Taylor theorem for functions of several variables, where the series expansion is around an infinitesimal neighborhood. Most of our proofs are in fact new. Our investigations highlight the possibility of using mathlib to do constructive mathematics.
format Preprint
id arxiv_https___arxiv_org_abs_2603_17457
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle Synthetic Differential Geometry in Lean
Brasca, Riccardo
Clemente, Gabriella
Logic in Computer Science
Differential Geometry
This article is about the formalization of synthetic differential geometry with the Lean proof assistant and the mathematical library mathlib. The main result we prove and formalize is a Taylor theorem for functions of several variables, where the series expansion is around an infinitesimal neighborhood. Most of our proofs are in fact new. Our investigations highlight the possibility of using mathlib to do constructive mathematics.
title Synthetic Differential Geometry in Lean
topic Logic in Computer Science
Differential Geometry
url https://arxiv.org/abs/2603.17457