{"id":13632787,"url":"https://github.com/the-little-prover/j-bob","last_synced_at":"2025-04-18T05:33:13.551Z","repository":{"id":34526240,"uuid":"38468815","full_name":"the-little-prover/j-bob","owner":"the-little-prover","description":null,"archived":false,"fork":false,"pushed_at":"2024-02-08T21:26:42.000Z","size":19,"stargazers_count":419,"open_issues_count":6,"forks_count":63,"subscribers_count":32,"default_branch":"master","last_synced_at":"2024-11-09T01:34:47.736Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":null,"language":"Scheme","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"bsd-2-clause","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/the-little-prover.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE.md","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2015-07-03T02:59:25.000Z","updated_at":"2024-09-23T01:32:38.000Z","dependencies_parsed_at":"2024-11-09T01:30:54.727Z","dependency_job_id":"342c69a5-216e-42c1-a7b7-286db0e9d45e","html_url":"https://github.com/the-little-prover/j-bob","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/the-little-prover%2Fj-bob","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/the-little-prover%2Fj-bob/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/the-little-prover%2Fj-bob/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/the-little-prover%2Fj-bob/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/the-little-prover","download_url":"https://codeload.github.com/the-little-prover/j-bob/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":249436987,"owners_count":21271981,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2024-08-01T22:03:15.751Z","updated_at":"2025-04-18T05:33:13.543Z","avatar_url":"https://github.com/the-little-prover.png","language":"Scheme","funding_links":[],"categories":["Scheme","Table of Contents"],"sub_categories":["Repos"],"readme":"# The Little Prover\n\nThis repository contains \"J-Bob\", the proof assistant from \"The Little Prover\"\nby Daniel P. Friedman and Carl Eastlund, published by MIT Press in 2015.  We\ninclude the necessary code to run J-Bob in ACL2 and Scheme, as well as a\ntranscript of the proofs in the book.  J-Bob is also included in the Dracula\npackage for Racket.\n\nExample of using J-Bob in Scheme, in the `scheme/` subdirectory:\n\n```scheme\n;; Load the J-Bob language:\n(load \"j-bob-lang.scm\")\n;; Load J-Bob, our little proof assistant:\n(load \"j-bob.scm\")\n;; Load the transcript of all proofs in the book:\n(load \"little-prover.scm\")\n;; Run every proof in the book, up to and including the proof of align/align:\n(dethm.align/align)\n```\n\nExample of using J-Bob in ACL2, in the `acl2/` subdirectory:\n\n```lisp\n;; Load the J-Bob language:\n(include-book \"j-bob-lang\")\n;; Load J-Bob, our little proof assistant:\n(include-book \"j-bob\")\n;; Load the transcript of all proofs in the book:\n(include-book \"little-prover\")\n;; Run every proof in the book, up to and including the proof of align/align:\n(dethm.align/align)\n```\n\nExample of using J-Bob in Racket, using the Dracula package:\n\n```lisp\n;; Load the J-Bob language:\n(include-book \"j-bob-lang\" :dir :teachpacks)\n;; Load J-Bob, our little proof assistant:\n(include-book \"j-bob\" :dir :teachpacks)\n;; Load the transcript of all proofs in the book:\n(include-book \"little-prover\" :dir :teachpacks)\n;; Run every proof in the book, up to and including the proof of align/align:\n(dethm.align/align)\n```\n\n---\n\nIf you want to load the Scheme version of J-Bob inside DrRacket, you will need\nto load it in the R5RS language with custom settings:\n\n1. Use the `Language` menu and the `Choose Language ...` option.\n2. In the dialog box that opens, select `Other Languages`.\n3. Under `Legacy Languages` choose `R5RS`.\n4. Select `Show Details` if there is not already a menu on the right of the dialog box.\n5. Under `Initial Bindings`, make sure that `Disallow redefinition of initial bindings` is *unchecked*.\n6. Then click `OK`, and J-Bob should work with those settings.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fthe-little-prover%2Fj-bob","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fthe-little-prover%2Fj-bob","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fthe-little-prover%2Fj-bob/lists"}