{"id":21919674,"url":"https://github.com/fusion809/simplex","last_synced_at":"2025-10-23T18:58:48.666Z","repository":{"id":167754507,"uuid":"306870784","full_name":"fusion809/simplex","owner":"fusion809","description":"Linear programme solver that uses the simplex method. Has advanced features and shows full working.","archived":false,"fork":false,"pushed_at":"2023-09-22T08:37:00.000Z","size":191,"stargazers_count":5,"open_issues_count":0,"forks_count":0,"subscribers_count":2,"default_branch":"master","last_synced_at":"2023-09-23T04:37:14.948Z","etag":null,"topics":["linear-programming-solver","operations-research","sensitivity-analysis","simplex","simplex-algorithm","simplex-method"],"latest_commit_sha":null,"homepage":"https://fusion809.github.io/simplex/","language":"JavaScript","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"gpl-3.0","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/fusion809.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null}},"created_at":"2020-10-24T11:41:17.000Z","updated_at":"2023-09-22T08:37:05.000Z","dependencies_parsed_at":"2023-09-22T20:07:37.350Z","dependency_job_id":null,"html_url":"https://github.com/fusion809/simplex","commit_stats":null,"previous_names":["fusion809/simplex"],"tags_count":3,"template":null,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/fusion809%2Fsimplex","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/fusion809%2Fsimplex/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/fusion809%2Fsimplex/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/fusion809%2Fsimplex/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/fusion809","download_url":"https://codeload.github.com/fusion809/simplex/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":226979172,"owners_count":17712574,"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":["linear-programming-solver","operations-research","sensitivity-analysis","simplex","simplex-algorithm","simplex-method"],"created_at":"2024-11-28T20:09:53.082Z","updated_at":"2025-10-23T18:58:43.614Z","avatar_url":"https://github.com/fusion809.png","language":"JavaScript","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Simplex method solver\nThis repository contains a webpage I have written to solve linear programmes using the simplex method. \n\nAs of 19 November 2020 this solver:\n* Prints messages indicating whether the solution is:\n  * Permanently degenerate.\n  * Permanently infeasible.\n  * Unbounded.\n* Prints the final solution, including decision variable values, dual variable values and objective function value.\n* Mentions whether a problem has alternate solutions and lists them.\n* Shows extensive working.\n* Uses USQ's [MAT2200](https://www.usq.edu.au/course/synopses/2020/MAT2200.html) simplex tableau layout (not sure the formal name for this layout).\n* Can perform sensitivity analysis, including:\n  * The adding of new constraint(s).\n  * The changing of objective function coefficient(s).\n  * The change in resource value(s) (the right-hand side of constraints).\n  * Constraint left-hand side change(s).\n  * The adding of new variable(s).\n* Allows the user to enter the problem in either matrix form or non-matrix form.\n\nShortcomings include:\n* Poor performance. For really big problems this solver is *very slow* (taking several seconds). Performance has been improved to an extent by reducing redundancy. Any optimizations will be welcome.\n* Does not solve integer programming problems (BB.js is an attempt at this, but it was abandoned due to the complexity of the recursion required).\n* While the original problem can be entered in non-matrix form, sensitivity analysis can only be performed with changes to the problem entered in matrix form.","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Ffusion809%2Fsimplex","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Ffusion809%2Fsimplex","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Ffusion809%2Fsimplex/lists"}