{"paper":{"title":"Five Dimensional Cosmological Models in General Relativity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Farook Rahaman, R. K. Tiwari, Saibal Ray","submitted_at":"2010-07-03T07:44:44Z","abstract_excerpt":"A Five dimensional Kaluza-Klein space-time is considered in the presence of a perfect fluid source with variable G and $\\Lambda$. An expanding universe is found by using a relation between the metric potential and an equation of state. The gravitational constant is found to decrease with time as $G \\sim t^{-(1-\\omega)}$ whereas the variation for the cosmological constant follows as $\\Lambda \\sim t^{-2}$, $\\Lambda \\sim (\\dot R/R)^2$ and $\\Lambda \\sim \\ddot R/R$ where $\\omega$ is the equation of state parameter and $R$ is the scale factor."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1007.0479","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}