{"corpus_id":53523282,"paper_sha":"46fbb978c59f374e0d62feb35644fda60fd88480","doi":"10.1103/PhysRevD.66.024027","arxiv_id":"gr-qc/0402119","pmid":null,"pmcid":null,"mag_id":2090098333,"dblp_id":null,"acl_id":null,"title":"A wide family of singularity-free cosmological models","year":2002,"publication_date":"2002-07-19","venue":"","journal":{"name":"Physical Review D","pages":"024027","volume":"66"},"journal_issn":null,"journal_title":null,"publication_types":[],"pubmed_pub_types":null,"s2_fields_of_study":["Physics"],"reference_count":10,"citation_count":14,"influential_citation_count":0,"is_open_access":true,"arxiv_categories":["gr-qc"],"arxiv_license":null,"arxiv_journal_ref":"Phys.Rev. D66 (2002) 024027","mesh_headings":null,"chemicals":null,"comments_corrections":null,"source_flags":1,"s2_open_access_pdf_url":"https://docta.ucm.es/bitstreams/fc3dc27b-157f-4fbf-8239-8c01f5284358/download","s2_open_access_landing_url":"https://www.semanticscholar.org/paper/46fbb978c59f374e0d62feb35644fda60fd88480","s2_open_access_license":"other-oa","s2_open_access_status":"GREEN","pmc_open_access_pdf_url":null,"pmc_open_access_landing_url":null,"pmc_open_access_license":null,"pmc_open_access_status":null,"unpaywall_open_access_pdf_url":null,"unpaywall_open_access_landing_url":null,"unpaywall_open_access_license":null,"unpaywall_open_access_status":null,"abstract":"In this paper a family of non-singular cylindrical perfect fluid cosmologies is derived. The equation of state corresponds to a stiff fluid. The family depends on two independent functions under very simple conditions. A sufficient condition for geodesic completeness is provided.","claims":[{"public_id":"cl_1523f11dd0bbe69347897edb18acec47","status":"active","text":"A family of non-singular cylindrical perfect fluid cosmologies is derived, with an equation of state corresponding to a stiff fluid.","confidence":0.95,"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_1523f11dd0bbe69347897edb18acec47"},{"public_id":"cl_d70700efcb0b631a279507ba2608168d","status":"active","text":"A sufficient condition for geodesic completeness is provided.","confidence":0.9,"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_d70700efcb0b631a279507ba2608168d"},{"public_id":"cl_943ecf602aca2d25a0b9df496f42732d","status":"active","text":"The family depends on two independent functions under very simple conditions.","confidence":0.9,"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_943ecf602aca2d25a0b9df496f42732d"}],"concepts":[{"public_id":"co_0700e3755620a75469096e8c6d9fa4ff","status":"active","name":"stiff fluid equation of state","description":"An equation of state where the pressure equals the energy density, used for the perfect fluid in the derived cosmologies.","types":["equation of state"],"aliases":[],"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_0700e3755620a75469096e8c6d9fa4ff"},{"public_id":"co_7e01591f5ca80e262dd6ce0ee7b58424","status":"active","name":"two independent functions","description":"Two functions that parameterize the family of cosmological models under simple conditions.","types":["parameter"],"aliases":[],"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_7e01591f5ca80e262dd6ce0ee7b58424"},{"public_id":"co_8218951851c6e93f1dc25e86a5f7c7f7","status":"active","name":"geodesic completeness","description":"A property ensuring that geodesics can be extended indefinitely, for which a sufficient condition is provided in the paper.","types":["property"],"aliases":[],"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_8218951851c6e93f1dc25e86a5f7c7f7"},{"public_id":"co_83f12048fc6b53a18f194e56b89b7ff2","status":"active","name":"non-singular cylindrical perfect fluid cosmologies","description":"A family of cosmological models that are cylindrical, contain a perfect fluid, and avoid singularities.","types":["cosmological model"],"aliases":[],"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_83f12048fc6b53a18f194e56b89b7ff2"},{"public_id":"co_e032b677275f6b1667d6afe55af38080","status":"active","name":"simple conditions","description":"Very simple conditions that the two independent functions must satisfy for the family to be valid.","types":["condition"],"aliases":[],"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_e032b677275f6b1667d6afe55af38080"}],"external_ids":{"DOI":"10.1103/PhysRevD.66.024027","ArXiv":"gr-qc/0402119","PubMed":null,"PubMedCentral":null,"MAG":2090098333,"DBLP":null,"ACL":null},"open_access":{"is_open_access":true,"pdf_url":"https://docta.ucm.es/bitstreams/fc3dc27b-157f-4fbf-8239-8c01f5284358/download","landing_url":"https://www.semanticscholar.org/paper/46fbb978c59f374e0d62feb35644fda60fd88480","source":"semantic_scholar","pdf_url_source":"semantic_scholar_open_access_pdf","license":"other-oa","status":"GREEN","reason":null},"reference_availability":{"status":"available","references_indexed":true,"full_text_available":true,"full_text_source":"arxiv","count_basis":"semantic_scholar_metadata","extraction_status":"not_applicable","reason":null},"source":{"provider":"episteme2","base_corpus":"semantic_scholar_dump","freshness_mode":"unknown","basis":["semantic_scholar_metadata","postgres_metadata"],"limits":["paper metadata is based on indexed upstream scholarly datasets","claims and concepts are available only for extracted papers","absence of claims or concepts means no extracted graph data is available in this response"],"status":"available","degraded":false,"degraded_reasons":[],"diagnostics":{"status":"available","degraded":false,"degraded_reasons":[],"metadata_status":"available","graph_status":"available","abstract_status":"available"},"source_flags":1},"paper_id":636074,"paper_uid":"a4c6e839-90fa-4ab2-b870-e9f59aa6c2ed","canonical_identity":{"paper_id":636074,"paper_uid":"a4c6e839-90fa-4ab2-b870-e9f59aa6c2ed","identity_status":"available","lookup_basis":"semantic_scholar_external_id","compatibility_path":"corpus_id"},"url":"https://sah.borca.ai/papers/53523282"}