{"id":"https://openalex.org/W1508570999","doi":"https://doi.org/10.1007/bfb0016279","title":"p-Projection reducibility and the complexity classes \u2112 (nonuniform) and N\u2112 (nonuniform)","display_name":"p-Projection reducibility and the complexity classes \u2112 (nonuniform) and N\u2112 (nonuniform)","publication_year":2005,"publication_date":"2005-11-13","ids":{"openalex":"https://openalex.org/W1508570999","doi":"https://doi.org/10.1007/bfb0016279","mag":"1508570999"},"language":"en","primary_location":{"id":"doi:10.1007/bfb0016279","is_oa":false,"landing_page_url":"https://doi.org/10.1007/bfb0016279","pdf_url":null,"source":{"id":"https://openalex.org/S106296714","display_name":"Lecture notes in computer science","issn_l":"0302-9743","issn":["0302-9743","1611-3349"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319900","host_organization_name":"Springer Science+Business Media","host_organization_lineage":["https://openalex.org/P4310319900","https://openalex.org/P4310319965"],"host_organization_lineage_names":["Springer Science+Business Media","Springer Nature"],"type":"book series"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Lecture Notes in Computer Science","raw_type":"book-chapter"},"type":"book-chapter","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/A5033952850","display_name":"Christoph Meinel","orcid":"https://orcid.org/0000-0002-3212-6201"},"institutions":[{"id":"https://openalex.org/I39343248","display_name":"Humboldt-Universit\u00e4t zu Berlin","ror":"https://ror.org/01hcx6992","country_code":"DE","type":"education","lineage":["https://openalex.org/I39343248"]}],"countries":["DE"],"is_corresponding":true,"raw_author_name":"Christoph Meinel","raw_affiliation_strings":["Sektion Mathematik der Humboldt-Universit\u00e4t, Berlin","Sektion Mathematik der Humboldt-Universit\u00e4t Berlin"],"affiliations":[{"raw_affiliation_string":"Sektion Mathematik der Humboldt-Universit\u00e4t, Berlin","institution_ids":["https://openalex.org/I39343248"]},{"raw_affiliation_string":"Sektion Mathematik der Humboldt-Universit\u00e4t Berlin","institution_ids":["https://openalex.org/I39343248"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5033952850"],"corresponding_institution_ids":["https://openalex.org/I39343248"],"apc_list":{"value":5000,"currency":"EUR","value_usd":5392},"apc_paid":null,"fwci":0.5299,"has_fulltext":false,"cited_by_count":19,"citation_normalized_percentile":{"value":0.64093567,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":null,"issue":null,"first_page":"527","last_page":"535"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11727","display_name":"Advanced Algebra and Logic","score":0.9965000152587891,"subfield":{"id":"https://openalex.org/subfields/1703","display_name":"Computational Theory and Mathematics"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11727","display_name":"Advanced Algebra and Logic","score":0.9965000152587891,"subfield":{"id":"https://openalex.org/subfields/1703","display_name":"Computational Theory and Mathematics"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12069","display_name":"Commutative Algebra and Its Applications","score":0.992900013923645,"subfield":{"id":"https://openalex.org/subfields/2602","display_name":"Algebra and Number Theory"},"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/T11703","display_name":"Rings, Modules, and Algebras","score":0.989799976348877,"subfield":{"id":"https://openalex.org/subfields/2602","display_name":"Algebra and Number Theory"},"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/projection","display_name":"Projection (relational algebra)","score":0.6036920547485352},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.37175053358078003},{"id":"https://openalex.org/keywords/materials-science","display_name":"Materials science","score":0.3253568410873413},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.21597665548324585}],"concepts":[{"id":"https://openalex.org/C57493831","wikidata":"https://www.wikidata.org/wiki/Q3134666","display_name":"Projection (relational algebra)","level":2,"score":0.6036920547485352},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.37175053358078003},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.3253568410873413},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.21597665548324585}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1007/bfb0016279","is_oa":false,"landing_page_url":"https://doi.org/10.1007/bfb0016279","pdf_url":null,"source":{"id":"https://openalex.org/S106296714","display_name":"Lecture notes in computer science","issn_l":"0302-9743","issn":["0302-9743","1611-3349"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319900","host_organization_name":"Springer Science+Business Media","host_organization_lineage":["https://openalex.org/P4310319900","https://openalex.org/P4310319965"],"host_organization_lineage_names":["Springer Science+Business Media","Springer Nature"],"type":"book series"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Lecture Notes in Computer Science","raw_type":"book-chapter"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":9,"referenced_works":["https://openalex.org/W1982129592","https://openalex.org/W1986804393","https://openalex.org/W2014850486","https://openalex.org/W2060270693","https://openalex.org/W2068330457","https://openalex.org/W2088141885","https://openalex.org/W2089857781","https://openalex.org/W2156184725","https://openalex.org/W6608031758"],"related_works":["https://openalex.org/W2748952813","https://openalex.org/W4246450666","https://openalex.org/W2898370298","https://openalex.org/W4388998267","https://openalex.org/W2744391499","https://openalex.org/W3120461830","https://openalex.org/W4230250635","https://openalex.org/W3041790586","https://openalex.org/W2018879842","https://openalex.org/W3144504424"],"abstract_inverted_index":null,"counts_by_year":[{"year":2023,"cited_by_count":1},{"year":2020,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}