{"id":"https://openalex.org/W2044117462","doi":"https://doi.org/10.2307/2275596","title":"Variations of the Martin-Solovay tree","display_name":"Variations of the Martin-Solovay tree","publication_year":1996,"publication_date":"1996-03-01","ids":{"openalex":"https://openalex.org/W2044117462","doi":"https://doi.org/10.2307/2275596","mag":"2044117462"},"language":"en","primary_location":{"id":"doi:10.2307/2275596","is_oa":false,"landing_page_url":"https://doi.org/10.2307/2275596","pdf_url":null,"source":{"id":"https://openalex.org/S177675236","display_name":"Journal of Symbolic Logic","issn_l":"0022-4812","issn":["0022-4812","1943-5886"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310311721","host_organization_name":"Cambridge University Press","host_organization_lineage":["https://openalex.org/P4310311721","https://openalex.org/P4310311702"],"host_organization_lineage_names":["Cambridge University Press","University of Cambridge"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Symbolic Logic","raw_type":"journal-article"},"type":"article","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/A5044036779","display_name":"Greg Hjorth","orcid":null},"institutions":[{"id":"https://openalex.org/I122411786","display_name":"California Institute of Technology","ror":"https://ror.org/05dxps055","country_code":"US","type":"education","lineage":["https://openalex.org/I122411786"]}],"countries":["US"],"is_corresponding":true,"raw_author_name":"Greg Hjorth","raw_affiliation_strings":["Mathematics Department, California Institute of Technology, Pasadena, California 91125, E-mail:","California  Institute of Technology"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Mathematics Department, California Institute of Technology, Pasadena, California 91125, E-mail:","institution_ids":["https://openalex.org/I122411786"]},{"raw_affiliation_string":"California  Institute of Technology","institution_ids":["https://openalex.org/I122411786"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5044036779"],"corresponding_institution_ids":["https://openalex.org/I122411786"],"apc_list":null,"apc_paid":null,"fwci":0.546,"has_fulltext":false,"cited_by_count":25,"citation_normalized_percentile":{"value":0.62014414,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":99},"biblio":{"volume":"61","issue":"1","first_page":"40","last_page":"51"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10588","display_name":"Mathematical Dynamics and Fractals","score":0.9587000012397766,"subfield":{"id":"https://openalex.org/subfields/2610","display_name":"Mathematical Physics"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10588","display_name":"Mathematical Dynamics and Fractals","score":0.9587000012397766,"subfield":{"id":"https://openalex.org/subfields/2610","display_name":"Mathematical Physics"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11152","display_name":"Stochastic processes and statistical mechanics","score":0.9391999840736389,"subfield":{"id":"https://openalex.org/subfields/2610","display_name":"Mathematical Physics"},"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/determinacy","display_name":"Determinacy","score":0.8978588581085205},{"id":"https://openalex.org/keywords/tree","display_name":"Tree (set theory)","score":0.6067187190055847},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.3904905915260315},{"id":"https://openalex.org/keywords/combinatorics","display_name":"Combinatorics","score":0.2036445438861847},{"id":"https://openalex.org/keywords/mathematical-analysis","display_name":"Mathematical analysis","score":0.06095755100250244}],"concepts":[{"id":"https://openalex.org/C58468513","wikidata":"https://www.wikidata.org/wiki/Q1201165","display_name":"Determinacy","level":2,"score":0.8978588581085205},{"id":"https://openalex.org/C113174947","wikidata":"https://www.wikidata.org/wiki/Q2859736","display_name":"Tree (set theory)","level":2,"score":0.6067187190055847},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.3904905915260315},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.2036445438861847},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.06095755100250244}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.2307/2275596","is_oa":false,"landing_page_url":"https://doi.org/10.2307/2275596","pdf_url":null,"source":{"id":"https://openalex.org/S177675236","display_name":"Journal of Symbolic Logic","issn_l":"0022-4812","issn":["0022-4812","1943-5886"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310311721","host_organization_name":"Cambridge University Press","host_organization_lineage":["https://openalex.org/P4310311721","https://openalex.org/P4310311702"],"host_organization_lineage_names":["Cambridge University Press","University of Cambridge"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Symbolic Logic","raw_type":"journal-article"},{"id":"pmh:oai:CULeuclid:euclid.jsl/1183744925","is_oa":false,"landing_page_url":"http://projecteuclid.org/euclid.jsl/1183744925","pdf_url":null,"source":{"id":"https://openalex.org/S4306400787","display_name":"Project Euclid (Cornell University)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Text"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":16,"referenced_works":["https://openalex.org/W154666901","https://openalex.org/W196306359","https://openalex.org/W939862140","https://openalex.org/W1555991696","https://openalex.org/W1974168517","https://openalex.org/W1993968567","https://openalex.org/W2038573095","https://openalex.org/W2083311400","https://openalex.org/W2096132708","https://openalex.org/W2270310008","https://openalex.org/W2316653939","https://openalex.org/W2346275115","https://openalex.org/W2482283928","https://openalex.org/W4230295967","https://openalex.org/W4291439952","https://openalex.org/W6644100192"],"related_works":["https://openalex.org/W3037524176","https://openalex.org/W45652848","https://openalex.org/W1521335825","https://openalex.org/W2505787881","https://openalex.org/W1482555883","https://openalex.org/W4213060090","https://openalex.org/W4301421734","https://openalex.org/W4236657165","https://openalex.org/W2063305408","https://openalex.org/W4239791835"],"abstract_inverted_index":{"Abstract":[0],"Assuming":[1],"determinacy,":[2],"the":[3,14],"model":[4],"L":[5],"[":[6],"T":[7,17],"2":[8,18],"]":[9],"does":[10],"not":[11],"depend":[12],"on":[13],"choice":[15],"of":[16],".":[19]},"counts_by_year":[{"year":2020,"cited_by_count":15},{"year":2019,"cited_by_count":1},{"year":2018,"cited_by_count":1},{"year":2017,"cited_by_count":1},{"year":2016,"cited_by_count":1},{"year":2015,"cited_by_count":2},{"year":2013,"cited_by_count":2},{"year":2012,"cited_by_count":1}],"updated_date":"2026-05-21T06:26:12.895304","created_date":"2025-10-10T00:00:00"}