leanprover-community/mathlib4
Feb 2026 – Mar 2026
2 Months active
Languages Used
Lean
Technical Skills
Formal VerificationMathematicsTheorem Provingfunctional programmingmathematical proofstype theory
David Gross
PROFILE
David Gross
David Gross contributed to the leanprover-community/mathlib4 repository by developing three features over two months, focusing on formal verification and mathematical proof engineering in Lean. He broadened dual-space handling in linear algebra modules by generalizing assumptions from NormedAddCommGroup to SeminormedAddCommGroup, improving API flexibility and reducing downstream friction. David also optimized type inference in inner product space theorems, enhancing compile-time performance. In the PiTensorProduct module, he refactored proofs for maintainability, reorganized them into lemmas, and transitioned the API from injectiveSeminorm to projectiveSeminorm. His work demonstrated depth in type theory, functional programming, and proof assistant tooling, addressing maintainability and performance.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
4Total
Bugs
0
Commits
4
Features
3
Lines of code
437
Activity Months2
Your Network
302 peopleSame Organization
@thp.uni-koeln.de1
Shared Repositories
301
Work History
March 2026
2 Commits • 1 Features
Mar 1, 2026Month 2026-03 — Monthly summary for leanprover-community/mathlib4 focusing on the PiTensorProduct module. Overview: This period’s work centered on a targeted structural refactor and API simplification of the PiTensorProduct module to improve maintainability, correctness, and alignment with the project’s deprecation plan for injectiveSeminorm. Two related commits drive the effort, establishing a clearer proof structure and a more robust seminorm API.
2 Commits • 1 Features
Mar 1, 2026Month 2026-03 — Monthly summary for leanprover-community/mathlib4 focusing on the PiTensorProduct module. Overview: This period’s work centered on a targeted structural refactor and API simplification of the PiTensorProduct module to improve maintainability, correctness, and alignment with the project’s deprecation plan for injectiveSeminorm. Two related commits drive the effort, establishing a clearer proof structure and a more robust seminorm API.
March 2026
February 2026
2 Commits • 2 Features
Feb 1, 2026February 2026 monthly summary for leanprover-community/mathlib4: Delivered two key improvements that enhance API flexibility for dual-space reasoning and improve compile-time performance for core linear-algebra results. Implemented a generalization from NormedAddCommGroup to SeminormedAddCommGroup in the dual-space workflow, and introduced explicit type hints to accelerate inference for the linear isometry equivalence theorem in inner product spaces. These changes were implemented in two commits and contribute to more robust, flexible math APIs and faster builds for downstream users.
February 2026
2 Commits • 2 Features
Feb 1, 2026February 2026 monthly summary for leanprover-community/mathlib4: Delivered two key improvements that enhance API flexibility for dual-space reasoning and improve compile-time performance for core linear-algebra results. Implemented a generalization from NormedAddCommGroup to SeminormedAddCommGroup in the dual-space workflow, and introduced explicit type hints to accelerate inference for the linear isometry equivalence theorem in inner product spaces. These changes were implemented in two commits and contribute to more robust, flexible math APIs and faster builds for downstream users.
Activity
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Quality Metrics
Correctness90.0%
Maintainability85.0%
Architecture90.0%
Performance85.0%
AI Usage25.0%
Skills & Technologies
Programming Languages
Lean
Technical Skills
Formal VerificationMathematicsTheorem Provingformal verificationfunctional programmingmathematical proofsmathematicsproof assistanttype theory
Repositories Contributed To
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