{"id":"https://openalex.org/W1990669969","doi":"https://doi.org/10.1103/physrevd.15.2734","title":"Exact Bianchi IV cosmological model","display_name":"Exact Bianchi IV cosmological model","publication_year":1977,"publication_date":"1977-05-15","ids":{"openalex":"https://openalex.org/W1990669969","doi":"https://doi.org/10.1103/physrevd.15.2734","mag":"1990669969"},"language":"en","primary_location":{"id":"doi:10.1103/physrevd.15.2734","doi":"https://doi.org/10.1103/physrevd.15.2734","is_oa":false,"landing_page_url":"https://doi.org/10.1103/physrevd.15.2734","pdf_url":null,"source":{"id":"https://openalex.org/S4210190737","display_name":"Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields","issn_l":"0556-2821","issn":["0556-2821","1089-4918","1538-4500","1550-2368","1550-7998"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","vabb-shw"],"host_organization":"https://openalex.org/P4310320261","host_organization_name":"American Physical Society","host_organization_lineage":["https://openalex.org/P4310320261"],"host_organization_lineage_names":["American Physical Society"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Physical Review D","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5001138214","display_name":"Alex Harvey","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I111455621","display_name":"Queens College, CUNY","ror":"https://ror.org/03v8adn41","country_code":"US","type":"education","lineage":["https://openalex.org/I111455621"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Alex Harvey","raw_affiliation_strings":["Queens College of the City, University of New York , Flushing, New York, 11367"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Queens College of the City, University of New York , Flushing, New York, 11367","institution_ids":["https://openalex.org/I111455621"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5059046858","display_name":"Dimitri Tsoubelis","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I111455621","display_name":"Queens College, CUNY","ror":"https://ror.org/03v8adn41","country_code":"US","type":"education","lineage":["https://openalex.org/I111455621"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Dimitri Tsoubelis","raw_affiliation_strings":["Queens College of the City, University of New York , Flushing, New York, 11367"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Queens College of the City, University of New York , Flushing, New York, 11367","institution_ids":["https://openalex.org/I111455621"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I111455621"],"apc_list":null,"apc_paid":null,"fwci":2.5091,"has_fulltext":false,"cited_by_count":26,"citation_normalized_percentile":{"value":0.86781058,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":96},"biblio":{"volume":"15","issue":"10","first_page":"2734","last_page":"2737"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10095","display_name":"Cosmology and Gravitation Theories","score":0.9761000275611877,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10095","display_name":"Cosmology and Gravitation Theories","score":0.9761000275611877,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11960","display_name":"Relativity and Gravitational Theory","score":0.011099999770522118,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13080","display_name":"Advanced Differential Geometry Research","score":0.006099999882280827,"subfield":{"id":"https://openalex.org/subfields/2608","display_name":"Geometry and Topology"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/exact-cosmological-solutions","display_name":"exact cosmological solutions","score":0.7760000228881836},{"id":"https://openalex.org/keywords/einstein-field-equations","display_name":"Einstein field equations","score":0.9380000233650208},{"id":"https://openalex.org/keywords/axisymmetric-spacetimes","display_name":"axisymmetric spacetimes","score":0.652999997138977},{"id":"https://openalex.org/keywords/cosmological-singularity","display_name":"cosmological singularity","score":0.6990000009536743},{"id":"https://openalex.org/keywords/asymptotically-flat-spacetimes","display_name":"asymptotically flat spacetimes","score":0.9179999828338623},{"id":"https://openalex.org/keywords/anisotropic-cosmological-models","display_name":"anisotropic cosmology","score":0.7770000100135803},{"id":"https://openalex.org/keywords/zero-cosmological-constant","display_name":"zero cosmological constant","score":0.7590000033378601},{"id":"https://openalex.org/keywords/ideal-fluid","display_name":"perfect fluid","score":0.5789999961853027}],"concepts":[{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.8603111505508423},{"id":"https://openalex.org/C37914503","wikidata":"https://www.wikidata.org/wiki/Q156495","display_name":"Mathematical physics","level":1,"score":0.7304759621620178},{"id":"https://openalex.org/C52220454","wikidata":"https://www.wikidata.org/wiki/Q613845","display_name":"Perfect fluid","level":2,"score":0.7118258476257324},{"id":"https://openalex.org/C16171025","wikidata":"https://www.wikidata.org/wiki/Q863349","display_name":"Singularity","level":2,"score":0.6912075281143188},{"id":"https://openalex.org/C166861157","wikidata":"https://www.wikidata.org/wiki/Q59151","display_name":"Cosmological constant","level":2,"score":0.657904863357544},{"id":"https://openalex.org/C146846114","wikidata":"https://www.wikidata.org/wiki/Q901448","display_name":"Einstein","level":2,"score":0.6012865304946899},{"id":"https://openalex.org/C33026886","wikidata":"https://www.wikidata.org/wiki/Q593950","display_name":"Rotational symmetry","level":2,"score":0.5902091264724731},{"id":"https://openalex.org/C2779886137","wikidata":"https://www.wikidata.org/wiki/Q21030012","display_name":"Symmetry (geometry)","level":2,"score":0.5710091590881348},{"id":"https://openalex.org/C2780813799","wikidata":"https://www.wikidata.org/wiki/Q3274237","display_name":"Zero (linguistics)","level":2,"score":0.5190570950508118},{"id":"https://openalex.org/C2780791080","wikidata":"https://www.wikidata.org/wiki/Q273711","display_name":"Einstein field equations","level":3,"score":0.5013113021850586},{"id":"https://openalex.org/C2992891135","wikidata":"https://www.wikidata.org/wiki/Q18346","display_name":"Cosmological model","level":3,"score":0.48679301142692566},{"id":"https://openalex.org/C74650414","wikidata":"https://www.wikidata.org/wiki/Q11397","display_name":"Classical mechanics","level":1,"score":0.44227609038352966},{"id":"https://openalex.org/C2777027219","wikidata":"https://www.wikidata.org/wiki/Q1284190","display_name":"Constant (computer programming)","level":2,"score":0.4277692437171936},{"id":"https://openalex.org/C108804581","wikidata":"https://www.wikidata.org/wiki/Q5447001","display_name":"Field equation","level":2,"score":0.41068127751350403},{"id":"https://openalex.org/C26405456","wikidata":"https://www.wikidata.org/wiki/Q338","display_name":"Cosmology","level":2,"score":0.3252534568309784},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.18400666117668152},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.16294622421264648},{"id":"https://openalex.org/C57879066","wikidata":"https://www.wikidata.org/wiki/Q41217","display_name":"Mechanics","level":1,"score":0.10059061646461487},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.09693077206611633},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.07004967331886292},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.05398279428482056},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.0},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0},{"id":"https://openalex.org/C41895202","wikidata":"https://www.wikidata.org/wiki/Q8162","display_name":"Linguistics","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1103/physrevd.15.2734","doi":"https://doi.org/10.1103/physrevd.15.2734","is_oa":false,"landing_page_url":"https://doi.org/10.1103/physrevd.15.2734","pdf_url":null,"source":{"id":"https://openalex.org/S4210190737","display_name":"Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields","issn_l":"0556-2821","issn":["0556-2821","1089-4918","1538-4500","1550-2368","1550-7998"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","vabb-shw"],"host_organization":"https://openalex.org/P4310320261","host_organization_name":"American Physical Society","host_organization_lineage":["https://openalex.org/P4310320261"],"host_organization_lineage_names":["American Physical Society"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Physical Review D","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":4,"referenced_works":["https://openalex.org/W2065960684","https://openalex.org/W2094838865","https://openalex.org/W2101799989","https://openalex.org/W2566388799"],"related_works":["https://openalex.org/W2008516987","https://openalex.org/W1991659599","https://openalex.org/W2067142646","https://openalex.org/W2027630698","https://openalex.org/W2093642576","https://openalex.org/W1999953719","https://openalex.org/W4317538617","https://openalex.org/W2087997218","https://openalex.org/W1970366782","https://openalex.org/W3043755510"],"abstract_inverted_index":{"An":[0],"analytical":[1],"global":[2],"solution":[3],"to":[4],"the":[5,10,25,36],"Einstein":[6],"field":[7],"equations":[8],"for":[9],"case":[11],"of":[12,38],"Bianchi":[13],"IV":[14],"symmetry":[15],"is":[16,19,28],"constructed.":[17],"It":[18],"axisymmetric,":[20],"has":[21],"a":[22,39],"singularity":[23],"in":[24],"finite":[26],"past,":[27],"asymptotically":[29],"flat":[30],"as":[31],"$t\\ensuremath{\\rightarrow}\\ensuremath{\\infty}$,":[32],"does":[33],"not":[34],"admit":[35],"presence":[37],"perfect":[40],"fluid":[41],"source,":[42],"and":[43],"must":[44],"have":[45],"zero":[46],"cosmological":[47],"constant.":[48]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2025,"cited_by_count":1},{"year":2023,"cited_by_count":1},{"year":2020,"cited_by_count":2},{"year":2018,"cited_by_count":2},{"year":2012,"cited_by_count":1}],"updated_date":"2026-11-07T11:25:07.637180","created_date":"2016-06-24T00:00:00"}
