HuwCampbell/lean4
Nov 2024 – Nov 2024
1 Month active
Languages Used
Lean
Technical Skills
Bitwise OperationsFormal VerificationTheorem Proving
Tobias Grosser
PROFILE
Tobias Grosser
Over a two-month period, contributed to formal verification and compiler development by enhancing bit-level reasoning in Lean4 and improving Lean integration for RISC-V verification. In the HuwCampbell/lean4 repository, developed BitVec bit-extraction lemmas that enable granular access to individual bits after arithmetic operations such as subtraction, negation, right shift, and absolute value, strengthening proof automation and downstream tooling. Later, in riscv/sail-riscv, addressed a Lean integration bug by restoring the missing sys_enable_zvkb axiom, stabilizing Zvkb support within RiscvExtras. Work demonstrated proficiency in Lean, bitwise operations, and embedded systems, with a focus on correctness and maintainability in formal methods.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
2Total
Bugs
1
Commits
2
Features
1
Lines of code
21
Activity Months2
Your Network
37 peopleSame Organization
@grosser.es1
Work History
March 2025
1 Commits
Mar 1, 2025March 2025 monthly summary for riscv/sail-riscv focused on Lean integration and quality improvements. Highlights include a targeted bug fix to restore proper Lean support for Zvkb within RiscvExtras and the resulting stability gains for downstream work. Overall impact: Reinforced reliable Lean-based verification for Zvkb in Sail RISC-V, reducing integration blockers and enabling smoother downstream development. The changes lay a solid foundation for future enhancements in Lean-enabled workflows for the RISC-V Sail project.
1 Commits
Mar 1, 2025March 2025 monthly summary for riscv/sail-riscv focused on Lean integration and quality improvements. Highlights include a targeted bug fix to restore proper Lean support for Zvkb within RiscvExtras and the resulting stability gains for downstream work. Overall impact: Reinforced reliable Lean-based verification for Zvkb in Sail RISC-V, reducing integration blockers and enabling smoother downstream development. The changes lay a solid foundation for future enhancements in Lean-enabled workflows for the RISC-V Sail project.
March 2025
November 2024
1 Commits • 1 Features
Nov 1, 2024Month: 2024-11 — Focused on strengthening bit-level reasoning in Lean4 by delivering BitVec bit-extraction lemmas after arithmetic operations. Implemented granular bit access for results after subtraction, negation, right shift, and absolute value, with changes concentrated in Bitblast and Lemmas Lean files. This work improves formal proofs, downstream tooling, and overall reliability of BitVec reasoning in Lean4.
November 2024
1 Commits • 1 Features
Nov 1, 2024Month: 2024-11 — Focused on strengthening bit-level reasoning in Lean4 by delivering BitVec bit-extraction lemmas after arithmetic operations. Implemented granular bit access for results after subtraction, negation, right shift, and absolute value, with changes concentrated in Bitblast and Lemmas Lean files. This work improves formal proofs, downstream tooling, and overall reliability of BitVec reasoning in Lean4.
Activity
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Quality Metrics
Correctness100.0%
Maintainability100.0%
Architecture100.0%
Performance100.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
Lean
Technical Skills
Bitwise OperationsCompiler DevelopmentEmbedded SystemsFormal VerificationTheorem Proving
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline
riscv/sail-riscv
Mar 2025 – Mar 2025
1 Month active
Languages Used
Lean
Technical Skills
Compiler DevelopmentEmbedded SystemsFormal Verification