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proof-theoretic-semantics

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Abraxas1010 / support-is-search

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Machine-checked formalization of Gheorghiu's 'Support is Search' theorem (arXiv:2603.13018v1) in Lean 4 — 74 theorems proving the relationship between base-extension support semantics and proof search for IPL, plus a compiled refutation of the standalone implication-forward schema on atomic-base kernels.

formal-verification proof-search intuitionistic-logic mathlib lean4 proof-theoretic-semantics base-extension-semantics
  • Updated Mar 19, 2026
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