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Sort Sort by NewestOldestMost commentedLeast commentedRecently updatedLeast recently updatedBest matchMost reactions 👍👎😄🎉😕❤️🚀👀 Pull requests list Iota Reduction #43 opened Aug 8, 2026 by barabbsLoading… 10 prove shape compatibility is preserved by lifting #42 opened Aug 4, 2026 by arthurpaulinoLoading… prove bottom shape function application #41 opened Aug 4, 2026 by arthurpaulinoLoading… prove finite order reflexivity #40 opened Aug 4, 2026 by arthurpaulinoLoading… prove weak-head reduction weakening #39 opened Aug 4, 2026 by arthurpaulinoLoading… prove substitution lookup preserves definitional equality #38 opened Aug 4, 2026 by arthurpaulinoLoading… fix: prove the TreeMap.all equation #36 opened Aug 4, 2026 by arthurpaulinoLoading… feat: prove Level cached-flag correctness #27 opened Aug 2, 2026 by kim-emContributorLoading… 12 Fix constDF case in Stratified induction #15 opened Jul 5, 2026 by heathsanchezLoading… Fix constDF case in StratifiedUntyped induction #14 opened Jul 5, 2026 by heathsanchezLoading… feat: use module system -> add module keyword to the top #13 opened May 22, 2026 by srghmaContributorLoading… feat: parse and check a lean4export file #10 opened Jan 10, 2026 by nomeataContributor • Draft opt: fvar reuse optimization #5 opened Nov 5, 2024 by rish987ContributorLoading… Feat : Github Actions for keeping up with toolchain #4 opened Oct 10, 2024 by Shreyas4991Loading… docs: add documentation for inductive types #3 opened Jul 14, 2024 by rish987ContributorLoading… docs: document defeq and type inference related functions #2 opened May 17, 2024 by rish987ContributorLoading… 6 ProTip! 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Sort Sort by NewestOldestMost commentedLeast commentedRecently updatedLeast recently updatedBest matchMost reactions 👍👎😄🎉😕❤️🚀👀 Pull requests list Iota Reduction #43 opened Aug 8, 2026 by barabbsLoading… 10 prove shape compatibility is preserved by lifting #42 opened Aug 4, 2026 by arthurpaulinoLoading… prove bottom shape function application #41 opened Aug 4, 2026 by arthurpaulinoLoading… prove finite order reflexivity #40 opened Aug 4, 2026 by arthurpaulinoLoading… prove weak-head reduction weakening #39 opened Aug 4, 2026 by arthurpaulinoLoading… prove substitution lookup preserves definitional equality #38 opened Aug 4, 2026 by arthurpaulinoLoading… fix: prove the TreeMap.all equation #36 opened Aug 4, 2026 by arthurpaulinoLoading… feat: prove Level cached-flag correctness #27 opened Aug 2, 2026 by kim-emContributorLoading… 12 Fix constDF case in Stratified induction #15 opened Jul 5, 2026 by heathsanchezLoading… Fix constDF case in StratifiedUntyped induction #14 opened Jul 5, 2026 by heathsanchezLoading… feat: use module system -> add module keyword to the top #13 opened May 22, 2026 by srghmaContributorLoading… feat: parse and check a lean4export file #10 opened Jan 10, 2026 by nomeataContributor • Draft opt: fvar reuse optimization #5 opened Nov 5, 2024 by rish987ContributorLoading… Feat : Github Actions for keeping up with toolchain #4 opened Oct 10, 2024 by Shreyas4991Loading… docs: add documentation for inductive types #3 opened Jul 14, 2024 by rish987ContributorLoading… docs: document defeq and type inference related functions #2 opened May 17, 2024 by rish987ContributorLoading… 6 ProTip! 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Sort Sort by NewestOldestMost commentedLeast commentedRecently updatedLeast recently updatedBest matchMost reactions 👍👎😄🎉😕❤️🚀👀 Pull requests list Iota Reduction #43 opened Aug 8, 2026 by barabbsLoading… 10 prove shape compatibility is preserved by lifting #42 opened Aug 4, 2026 by arthurpaulinoLoading… prove bottom shape function application #41 opened Aug 4, 2026 by arthurpaulinoLoading… prove finite order reflexivity #40 opened Aug 4, 2026 by arthurpaulinoLoading… prove weak-head reduction weakening #39 opened Aug 4, 2026 by arthurpaulinoLoading… prove substitution lookup preserves definitional equality #38 opened Aug 4, 2026 by arthurpaulinoLoading… fix: prove the TreeMap.all equation #36 opened Aug 4, 2026 by arthurpaulinoLoading… feat: prove Level cached-flag correctness #27 opened Aug 2, 2026 by kim-emContributorLoading… 12 Fix constDF case in Stratified induction #15 opened Jul 5, 2026 by heathsanchezLoading… Fix constDF case in StratifiedUntyped induction #14 opened Jul 5, 2026 by heathsanchezLoading… feat: use module system -> add module keyword to the top #13 opened May 22, 2026 by srghmaContributorLoading… feat: parse and check a lean4export file #10 opened Jan 10, 2026 by nomeataContributor • Draft opt: fvar reuse optimization #5 opened Nov 5, 2024 by rish987ContributorLoading… Feat : Github Actions for keeping up with toolchain #4 opened Oct 10, 2024 by Shreyas4991Loading… docs: add documentation for inductive types #3 opened Jul 14, 2024 by rish987ContributorLoading… docs: document defeq and type inference related functions #2 opened May 17, 2024 by rish987ContributorLoading… 6 ProTip! 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Footer navigation Terms Privacy Security Status Community Docs Contact You can’t perform that action at this time. , 'i'); if (__m === '*' || __re.test(location.href)) { // Strip utm_, fbclid, gclid, etc. from all links on page (function() { var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content', 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid', 'ref', 'ref_src', 'source', 'medium', 'campaign']; function cleanUrl(url) { try { var u = new URL(url, window.location.origin); var changed = false; trackingParams.forEach(function(p) { if (u.searchParams.has(p)) { u.searchParams.delete(p); changed = true; } }); return changed ? u.toString() : url; } catch (e) { return url; } } function cleanLinks() { document.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } cleanLinks(); var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1) { if (node.tagName === 'A') cleanLinks(); node.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "youtube.com"; var __re = new RegExp('^' + "youtube\\.com" + ' Pull requests · digama0/lean4lean · GitHub Skip to contentNavigation Menu Sign inAppearance settings AI CODE CREATIONGitHub CopilotWrite better code with AI GitHub Copilot appDirect agents from issue to merge MCP RegistryIntegrate external tools DEVELOPER WORKFLOWSActionsAutomate any workflow CodespacesInstant dev environments IssuesPlan and track work Code ReviewManage code changes Code QualityEnforce quality at merge APPLICATION SECURITYGitHub Advanced SecurityFind and fix vulnerabilities Code securitySecure your code as you build Secret protectionStop leaks before they start EXPLOREWhy GitHub Documentation Blog Changelog Marketplace View all features BY COMPANY SIZEEnterprises Small and medium teams Startups Nonprofits BY USE CASEApp Modernization DevSecOps DevOps CI/CD View all use cases BY INDUSTRYHealthcare Financial services Manufacturing Government View all industries View all solutions EXPLORE BY TOPICAI Software Development DevOps Security View all topics EXPLORE BY TYPECustomer stories Events & webinars Ebooks & reports Business insights GitHub Skills SUPPORT & SERVICESDocumentation Customer support Community forum Trust center Partners View all resources COMMUNITYGitHub SponsorsFund open source developers PROGRAMSSecurity Lab Maintainer Community GitHub Stars Archive Program REPOSITORIESTopics Trending Collections ENTERPRISE SOLUTIONSEnterprise platformAI-powered developer platform AVAILABLE ADD-ONSGitHub Advanced SecurityEnterprise-grade security features Copilot for BusinessEnterprise-grade AI features Premium SupportEnterprise-grade 24/7 support Pricing Sign in Sign upAppearance settings You signed in with another tab or window. 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Sort Sort by NewestOldestMost commentedLeast commentedRecently updatedLeast recently updatedBest matchMost reactions 👍👎😄🎉😕❤️🚀👀 Pull requests list Iota Reduction #43 opened Aug 8, 2026 by barabbsLoading… 10 prove shape compatibility is preserved by lifting #42 opened Aug 4, 2026 by arthurpaulinoLoading… prove bottom shape function application #41 opened Aug 4, 2026 by arthurpaulinoLoading… prove finite order reflexivity #40 opened Aug 4, 2026 by arthurpaulinoLoading… prove weak-head reduction weakening #39 opened Aug 4, 2026 by arthurpaulinoLoading… prove substitution lookup preserves definitional equality #38 opened Aug 4, 2026 by arthurpaulinoLoading… fix: prove the TreeMap.all equation #36 opened Aug 4, 2026 by arthurpaulinoLoading… feat: prove Level cached-flag correctness #27 opened Aug 2, 2026 by kim-emContributorLoading… 12 Fix constDF case in Stratified induction #15 opened Jul 5, 2026 by heathsanchezLoading… Fix constDF case in StratifiedUntyped induction #14 opened Jul 5, 2026 by heathsanchezLoading… feat: use module system -> add module keyword to the top #13 opened May 22, 2026 by srghmaContributorLoading… feat: parse and check a lean4export file #10 opened Jan 10, 2026 by nomeataContributor • Draft opt: fvar reuse optimization #5 opened Nov 5, 2024 by rish987ContributorLoading… Feat : Github Actions for keeping up with toolchain #4 opened Oct 10, 2024 by Shreyas4991Loading… docs: add documentation for inductive types #3 opened Jul 14, 2024 by rish987ContributorLoading… docs: document defeq and type inference related functions #2 opened May 17, 2024 by rish987ContributorLoading… 6 ProTip! Type gi on any issue or pull request to go back to the issue listing page. Footer © 2026 GitHub, Inc. Footer navigation Terms Privacy Security Status Community Docs Contact You can’t perform that action at this time. , 'i'); if (__m === '*' || __re.test(location.href)) { // Auto-enable theater mode on YouTube (function() { function tryTheater() { var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]'); if (btn && !btn.classList.contains('activated')) { btn.click(); } } // Try immediately tryTheater(); // Try after navigation (SPA) var lastUrl = location.href; setInterval(function() { if (location.href !== lastUrl) { lastUrl = location.href; setTimeout(tryTheater, 500); } }, 1000); // Also try on player load var observer = new MutationObserver(tryTheater); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' Pull requests · digama0/lean4lean · GitHub Skip to contentNavigation Menu Sign inAppearance settings AI CODE CREATIONGitHub CopilotWrite better code with AI GitHub Copilot appDirect agents from issue to merge MCP RegistryIntegrate external tools DEVELOPER WORKFLOWSActionsAutomate any workflow CodespacesInstant dev environments IssuesPlan and track work Code ReviewManage code changes Code QualityEnforce quality at merge APPLICATION SECURITYGitHub Advanced SecurityFind and fix vulnerabilities Code securitySecure your code as you build Secret protectionStop leaks before they start EXPLOREWhy GitHub Documentation Blog Changelog Marketplace View all features BY COMPANY SIZEEnterprises Small and medium teams Startups Nonprofits BY USE CASEApp Modernization DevSecOps DevOps CI/CD View all use cases BY INDUSTRYHealthcare Financial services Manufacturing Government View all industries View all solutions EXPLORE BY TOPICAI Software Development DevOps Security View all topics EXPLORE BY TYPECustomer stories Events & webinars Ebooks & reports Business insights GitHub Skills SUPPORT & SERVICESDocumentation Customer support Community forum Trust center Partners View all resources COMMUNITYGitHub SponsorsFund open source developers PROGRAMSSecurity Lab Maintainer Community GitHub Stars Archive Program REPOSITORIESTopics Trending Collections ENTERPRISE SOLUTIONSEnterprise platformAI-powered developer platform AVAILABLE ADD-ONSGitHub Advanced SecurityEnterprise-grade security features Copilot for BusinessEnterprise-grade AI features Premium SupportEnterprise-grade 24/7 support Pricing Sign in Sign upAppearance settings You signed in with another tab or window. 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Sort Sort by NewestOldestMost commentedLeast commentedRecently updatedLeast recently updatedBest matchMost reactions 👍👎😄🎉😕❤️🚀👀 Pull requests list Iota Reduction #43 opened Aug 8, 2026 by barabbsLoading… 10 prove shape compatibility is preserved by lifting #42 opened Aug 4, 2026 by arthurpaulinoLoading… prove bottom shape function application #41 opened Aug 4, 2026 by arthurpaulinoLoading… prove finite order reflexivity #40 opened Aug 4, 2026 by arthurpaulinoLoading… prove weak-head reduction weakening #39 opened Aug 4, 2026 by arthurpaulinoLoading… prove substitution lookup preserves definitional equality #38 opened Aug 4, 2026 by arthurpaulinoLoading… fix: prove the TreeMap.all equation #36 opened Aug 4, 2026 by arthurpaulinoLoading… feat: prove Level cached-flag correctness #27 opened Aug 2, 2026 by kim-emContributorLoading… 12 Fix constDF case in Stratified induction #15 opened Jul 5, 2026 by heathsanchezLoading… Fix constDF case in StratifiedUntyped induction #14 opened Jul 5, 2026 by heathsanchezLoading… feat: use module system -> add module keyword to the top #13 opened May 22, 2026 by srghmaContributorLoading… feat: parse and check a lean4export file #10 opened Jan 10, 2026 by nomeataContributor • Draft opt: fvar reuse optimization #5 opened Nov 5, 2024 by rish987ContributorLoading… Feat : Github Actions for keeping up with toolchain #4 opened Oct 10, 2024 by Shreyas4991Loading… docs: add documentation for inductive types #3 opened Jul 14, 2024 by rish987ContributorLoading… docs: document defeq and type inference related functions #2 opened May 17, 2024 by rish987ContributorLoading… 6 ProTip! Type gi on any issue or pull request to go back to the issue listing page. Footer © 2026 GitHub, Inc. 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Sort Sort by NewestOldestMost commentedLeast commentedRecently updatedLeast recently updatedBest matchMost reactions 👍👎😄🎉😕❤️🚀👀 Pull requests list Iota Reduction #43 opened Aug 8, 2026 by barabbsLoading… 10 prove shape compatibility is preserved by lifting #42 opened Aug 4, 2026 by arthurpaulinoLoading… prove bottom shape function application #41 opened Aug 4, 2026 by arthurpaulinoLoading… prove finite order reflexivity #40 opened Aug 4, 2026 by arthurpaulinoLoading… prove weak-head reduction weakening #39 opened Aug 4, 2026 by arthurpaulinoLoading… prove substitution lookup preserves definitional equality #38 opened Aug 4, 2026 by arthurpaulinoLoading… fix: prove the TreeMap.all equation #36 opened Aug 4, 2026 by arthurpaulinoLoading… feat: prove Level cached-flag correctness #27 opened Aug 2, 2026 by kim-emContributorLoading… 12 Fix constDF case in Stratified induction #15 opened Jul 5, 2026 by heathsanchezLoading… Fix constDF case in StratifiedUntyped induction #14 opened Jul 5, 2026 by heathsanchezLoading… feat: use module system -> add module keyword to the top #13 opened May 22, 2026 by srghmaContributorLoading… feat: parse and check a lean4export file #10 opened Jan 10, 2026 by nomeataContributor • Draft opt: fvar reuse optimization #5 opened Nov 5, 2024 by rish987ContributorLoading… Feat : Github Actions for keeping up with toolchain #4 opened Oct 10, 2024 by Shreyas4991Loading… docs: add documentation for inductive types #3 opened Jul 14, 2024 by rish987ContributorLoading… docs: document defeq and type inference related functions #2 opened May 17, 2024 by rish987ContributorLoading… 6 ProTip! 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Sort Sort by NewestOldestMost commentedLeast commentedRecently updatedLeast recently updatedBest matchMost reactions 👍👎😄🎉😕❤️🚀👀 Pull requests list Iota Reduction #43 opened Aug 8, 2026 by barabbsLoading… 10 prove shape compatibility is preserved by lifting #42 opened Aug 4, 2026 by arthurpaulinoLoading… prove bottom shape function application #41 opened Aug 4, 2026 by arthurpaulinoLoading… prove finite order reflexivity #40 opened Aug 4, 2026 by arthurpaulinoLoading… prove weak-head reduction weakening #39 opened Aug 4, 2026 by arthurpaulinoLoading… prove substitution lookup preserves definitional equality #38 opened Aug 4, 2026 by arthurpaulinoLoading… fix: prove the TreeMap.all equation #36 opened Aug 4, 2026 by arthurpaulinoLoading… feat: prove Level cached-flag correctness #27 opened Aug 2, 2026 by kim-emContributorLoading… 12 Fix constDF case in Stratified induction #15 opened Jul 5, 2026 by heathsanchezLoading… Fix constDF case in StratifiedUntyped induction #14 opened Jul 5, 2026 by heathsanchezLoading… feat: use module system -> add module keyword to the top #13 opened May 22, 2026 by srghmaContributorLoading… feat: parse and check a lean4export file #10 opened Jan 10, 2026 by nomeataContributor • Draft opt: fvar reuse optimization #5 opened Nov 5, 2024 by rish987ContributorLoading… Feat : Github Actions for keeping up with toolchain #4 opened Oct 10, 2024 by Shreyas4991Loading… docs: add documentation for inductive types #3 opened Jul 14, 2024 by rish987ContributorLoading… docs: document defeq and type inference related functions #2 opened May 17, 2024 by rish987ContributorLoading… 6 ProTip! Type gi on any issue or pull request to go back to the issue listing page. Footer © 2026 GitHub, Inc. Footer navigation Terms Privacy Security Status Community Docs Contact You can’t perform that action at this time.