{"id":33180747,"url":"https://github.com/friguzzi/matrix","last_synced_at":"2025-11-20T21:04:45.927Z","repository":{"id":75592813,"uuid":"65497095","full_name":"friguzzi/matrix","owner":"friguzzi","description":"Operations with matrices, SWI pack","archived":false,"fork":false,"pushed_at":"2023-12-11T07:47:56.000Z","size":49,"stargazers_count":9,"open_issues_count":0,"forks_count":2,"subscribers_count":5,"default_branch":"master","last_synced_at":"2024-02-15T07:34:19.028Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":"","language":"Prolog","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/friguzzi.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,"roadmap":null,"authors":null}},"created_at":"2016-08-11T19:48:41.000Z","updated_at":"2023-08-03T00:47:37.000Z","dependencies_parsed_at":"2023-12-11T08:50:06.664Z","dependency_job_id":null,"html_url":"https://github.com/friguzzi/matrix","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/friguzzi/matrix","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/friguzzi%2Fmatrix","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/friguzzi%2Fmatrix/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/friguzzi%2Fmatrix/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/friguzzi%2Fmatrix/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/friguzzi","download_url":"https://codeload.github.com/friguzzi/matrix/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/friguzzi%2Fmatrix/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":285512105,"owners_count":27184309,"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","status":"online","status_checked_at":"2025-11-20T02:00:05.334Z","response_time":54,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"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":"2025-11-16T04:00:23.090Z","updated_at":"2025-11-20T21:04:45.922Z","avatar_url":"https://github.com/friguzzi.png","language":"Prolog","funding_links":[],"categories":["Math"],"sub_categories":[],"readme":"# matrix\n\nSWI-Prolog pack for matrix operations. \nImplemented operations:\n - sum\n - difference\n - multiplication\n - Cholesky decomposition https://en.wikipedia.org/wiki/Cholesky_decomposition\n - determinant for positive semi-definite matrices (using Cholesky decomposition)\n - inversion for positive semi-definite matrices (using Cholesky decomposition)\n - inversion for lower triangular matrices \n - identity matrix\n - diagonal matrix\n\nThe library was developed for dealing with multivariate Gaussian distributions, \nthat's the reason for the focus on positive semi-definite matrices\n\nExample of use\n---------------\n\n    $ swipl\n    ?- use_module(library(matrix)).\n    ?- determinant([[2,-1,0],[-1,2,-1],[0,-1,2]],D).\n    D = 3.999999999999999.\n\n## Documentation\n\nhttps://friguzzi.github.io/matrix","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Ffriguzzi%2Fmatrix","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Ffriguzzi%2Fmatrix","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Ffriguzzi%2Fmatrix/lists"}