{"id":"https://openalex.org/W2138819365","doi":"https://doi.org/10.1007/bf00265560","title":"On the number of relational operators necessary to compute certain functions of real variables","display_name":"On the number of relational operators necessary to compute certain functions of real variables","publication_year":1983,"publication_date":"1983-07-01","ids":{"openalex":"https://openalex.org/W2138819365","doi":"https://doi.org/10.1007/bf00265560","mag":"2138819365"},"language":"en","primary_location":{"id":"doi:10.1007/bf00265560","is_oa":false,"landing_page_url":"https://doi.org/10.1007/bf00265560","pdf_url":null,"source":{"id":"https://openalex.org/S84409463","display_name":"Acta Informatica","issn_l":"0001-5903","issn":["0001-5903","1432-0525"],"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":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Acta Informatica","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/A5111447388","display_name":"Alfred Schmitt","orcid":null},"institutions":[{"id":"https://openalex.org/I102335020","display_name":"Karlsruhe Institute of Technology","ror":"https://ror.org/04t3en479","country_code":"DE","type":"education","lineage":["https://openalex.org/I102335020","https://openalex.org/I1305996414"]}],"countries":["DE"],"is_corresponding":true,"raw_author_name":"Alfred Schmitt","raw_affiliation_strings":["Institut f\u00fcr Informatik I, Universit\u00e4t Karlsruhe, Kaiserstr. 12, D-7500, Karlsruhe, Fed Rep","Institut f\u00fcr Informatik I, Universit\u00e4t Karlsruhe, Karlsruhe, Fed Rep. D-7500#TAB#"],"affiliations":[{"raw_affiliation_string":"Institut f\u00fcr Informatik I, Universit\u00e4t Karlsruhe, Kaiserstr. 12, D-7500, Karlsruhe, Fed Rep","institution_ids":[]},{"raw_affiliation_string":"Institut f\u00fcr Informatik I, Universit\u00e4t Karlsruhe, Karlsruhe, Fed Rep. D-7500#TAB#","institution_ids":["https://openalex.org/I102335020"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5111447388"],"corresponding_institution_ids":["https://openalex.org/I102335020"],"apc_list":{"value":2390,"currency":"EUR","value_usd":2990},"apc_paid":null,"fwci":0.9314,"has_fulltext":false,"cited_by_count":6,"citation_normalized_percentile":{"value":0.78890716,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":"19","issue":"3","first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T14470","display_name":"Advanced Data Processing Techniques","score":0.761900007724762,"subfield":{"id":"https://openalex.org/subfields/2207","display_name":"Control and Systems Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T14470","display_name":"Advanced Data Processing Techniques","score":0.761900007724762,"subfield":{"id":"https://openalex.org/subfields/2207","display_name":"Control and Systems Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/sorting","display_name":"Sorting","score":0.6322617530822754},{"id":"https://openalex.org/keywords/theory-of-computation","display_name":"Theory of computation","score":0.6317471861839294},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.5326648950576782},{"id":"https://openalex.org/keywords/function","display_name":"Function (biology)","score":0.5285030007362366},{"id":"https://openalex.org/keywords/computation","display_name":"Computation","score":0.5111094117164612},{"id":"https://openalex.org/keywords/relational-database","display_name":"Relational database","score":0.5003318786621094},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.46554434299468994},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.36361798644065857},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.3044789433479309},{"id":"https://openalex.org/keywords/data-mining","display_name":"Data mining","score":0.07920855283737183}],"concepts":[{"id":"https://openalex.org/C111696304","wikidata":"https://www.wikidata.org/wiki/Q2303697","display_name":"Sorting","level":2,"score":0.6322617530822754},{"id":"https://openalex.org/C24858836","wikidata":"https://www.wikidata.org/wiki/Q844718","display_name":"Theory of computation","level":2,"score":0.6317471861839294},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.5326648950576782},{"id":"https://openalex.org/C14036430","wikidata":"https://www.wikidata.org/wiki/Q3736076","display_name":"Function (biology)","level":2,"score":0.5285030007362366},{"id":"https://openalex.org/C45374587","wikidata":"https://www.wikidata.org/wiki/Q12525525","display_name":"Computation","level":2,"score":0.5111094117164612},{"id":"https://openalex.org/C5655090","wikidata":"https://www.wikidata.org/wiki/Q192588","display_name":"Relational database","level":2,"score":0.5003318786621094},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.46554434299468994},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.36361798644065857},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.3044789433479309},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.07920855283737183},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.0},{"id":"https://openalex.org/C78458016","wikidata":"https://www.wikidata.org/wiki/Q840400","display_name":"Evolutionary biology","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1007/bf00265560","is_oa":false,"landing_page_url":"https://doi.org/10.1007/bf00265560","pdf_url":null,"source":{"id":"https://openalex.org/S84409463","display_name":"Acta Informatica","issn_l":"0001-5903","issn":["0001-5903","1432-0525"],"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":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Acta Informatica","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/10","score":0.5099999904632568,"display_name":"Reduced inequalities"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":7,"referenced_works":["https://openalex.org/W1655990431","https://openalex.org/W1999447420","https://openalex.org/W2039131398","https://openalex.org/W2077449861","https://openalex.org/W2082045536","https://openalex.org/W2091563751","https://openalex.org/W2947000318"],"related_works":["https://openalex.org/W2354062721","https://openalex.org/W2515667805","https://openalex.org/W1534842550","https://openalex.org/W2375701581","https://openalex.org/W2031959132","https://openalex.org/W1970403310","https://openalex.org/W2025460265","https://openalex.org/W2386545545","https://openalex.org/W2570731419","https://openalex.org/W3104225535"],"abstract_inverted_index":null,"counts_by_year":[{"year":2023,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}