{"id":"https://openalex.org/W1969028136","doi":"https://doi.org/10.1016/s0021-9045(02)00018-7","title":"Harmonic approximation and Sarason's-type theorem","display_name":"Harmonic approximation and Sarason's-type theorem","publication_year":2003,"publication_date":"2003-01-01","ids":{"openalex":"https://openalex.org/W1969028136","doi":"https://doi.org/10.1016/s0021-9045(02)00018-7","mag":"1969028136"},"language":"en","primary_location":{"id":"doi:10.1016/s0021-9045(02)00018-7","is_oa":true,"landing_page_url":"https://doi.org/10.1016/s0021-9045(02)00018-7","pdf_url":"https://www.sciencedirect.com/science/article/pii/S0021904502000187/pdf","source":{"id":"https://openalex.org/S35093870","display_name":"Journal of Approximation Theory","issn_l":"0021-9045","issn":["0021-9045","1096-0430"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310320990","host_organization_name":"Elsevier BV","host_organization_lineage":["https://openalex.org/P4310320990"],"host_organization_lineage_names":["Elsevier BV"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Approximation Theory","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"bronze","oa_url":"https://www.sciencedirect.com/science/article/pii/S0021904502000187/pdf","any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5037973417","display_name":"Wolfhard Hansen","orcid":"https://orcid.org/0000-0002-8310-0132"},"institutions":[{"id":"https://openalex.org/I20121455","display_name":"Bielefeld University","ror":"https://ror.org/02hpadn98","country_code":"DE","type":"education","lineage":["https://openalex.org/I20121455"]}],"countries":["DE"],"is_corresponding":true,"raw_author_name":"Wolfhard Hansen","raw_affiliation_strings":["Fakult\u00e4t f\u00fcr Mathematik, Universit\u00e4t Bielefeld, Postfach 100 131, Bielefeld, Germany#TAB#"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Fakult\u00e4t f\u00fcr Mathematik, Universit\u00e4t Bielefeld, Postfach 100 131, Bielefeld, Germany#TAB#","institution_ids":["https://openalex.org/I20121455"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5050142445","display_name":"Ivan Netuka","orcid":"https://orcid.org/0000-0001-6310-4681"},"institutions":[{"id":"https://openalex.org/I21250087","display_name":"Charles University","ror":"https://ror.org/024d6js02","country_code":"CZ","type":"education","lineage":["https://openalex.org/I21250087"]}],"countries":["CZ"],"is_corresponding":false,"raw_author_name":"Ivan Netuka","raw_affiliation_strings":["Mathematical Institute, Charles University, Sokolovsk\u00e1 86, 186 75 Praha 8, Czech Republic","Mathematical Institute, Charles University, Sokolovsk\u00e1, 186 75 Praha 8, Czech Republic#TAB#"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Mathematical Institute, Charles University, Sokolovsk\u00e1 86, 186 75 Praha 8, Czech Republic","institution_ids":["https://openalex.org/I21250087"]},{"raw_affiliation_string":"Mathematical Institute, Charles University, Sokolovsk\u00e1, 186 75 Praha 8, Czech Republic#TAB#","institution_ids":["https://openalex.org/I21250087"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5037973417"],"corresponding_institution_ids":["https://openalex.org/I20121455"],"apc_list":{"value":2600,"currency":"USD","value_usd":2600},"apc_paid":null,"fwci":0.3893,"has_fulltext":true,"cited_by_count":1,"citation_normalized_percentile":{"value":0.51796657,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"120","issue":"1","first_page":"183","last_page":"190"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11205","display_name":"Numerical methods in inverse problems","score":0.9854000210762024,"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/T11205","display_name":"Numerical methods in inverse problems","score":0.9854000210762024,"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/T12589","display_name":"Differential Equations and Boundary Problems","score":0.9814000129699707,"subfield":{"id":"https://openalex.org/subfields/2604","display_name":"Applied Mathematics"},"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/T12100","display_name":"Advanced Mathematical Modeling in Engineering","score":0.9757999777793884,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.8968418836593628},{"id":"https://openalex.org/keywords/harmonic-function","display_name":"Harmonic function","score":0.781223714351654},{"id":"https://openalex.org/keywords/harmonic-measure","display_name":"Harmonic measure","score":0.6508378982543945},{"id":"https://openalex.org/keywords/euclidean-space","display_name":"Euclidean space","score":0.642708420753479},{"id":"https://openalex.org/keywords/harmonic","display_name":"Harmonic","score":0.6201263666152954},{"id":"https://openalex.org/keywords/bounded-function","display_name":"Bounded function","score":0.6116681098937988},{"id":"https://openalex.org/keywords/space","display_name":"Space (punctuation)","score":0.4819731116294861},{"id":"https://openalex.org/keywords/dirichlet-distribution","display_name":"Dirichlet distribution","score":0.4803118109703064},{"id":"https://openalex.org/keywords/type","display_name":"Type (biology)","score":0.4714183509349823},{"id":"https://openalex.org/keywords/euclidean-geometry","display_name":"Euclidean geometry","score":0.4615715742111206},{"id":"https://openalex.org/keywords/pure-mathematics","display_name":"Pure mathematics","score":0.4496873915195465},{"id":"https://openalex.org/keywords/mathematical-analysis","display_name":"Mathematical analysis","score":0.44679737091064453},{"id":"https://openalex.org/keywords/open-set","display_name":"Open set","score":0.44442349672317505},{"id":"https://openalex.org/keywords/dirichlet-problem","display_name":"Dirichlet problem","score":0.4283004105091095},{"id":"https://openalex.org/keywords/potential-theory","display_name":"Potential theory","score":0.4215150773525238},{"id":"https://openalex.org/keywords/harmonic-analysis","display_name":"Harmonic analysis","score":0.41132861375808716},{"id":"https://openalex.org/keywords/boundary-value-problem","display_name":"Boundary value problem","score":0.16840076446533203}],"concepts":[{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.8968418836593628},{"id":"https://openalex.org/C627467","wikidata":"https://www.wikidata.org/wiki/Q599027","display_name":"Harmonic function","level":2,"score":0.781223714351654},{"id":"https://openalex.org/C53688716","wikidata":"https://www.wikidata.org/wiki/Q5659270","display_name":"Harmonic measure","level":3,"score":0.6508378982543945},{"id":"https://openalex.org/C186450821","wikidata":"https://www.wikidata.org/wiki/Q17295","display_name":"Euclidean space","level":2,"score":0.642708420753479},{"id":"https://openalex.org/C127934551","wikidata":"https://www.wikidata.org/wiki/Q1148098","display_name":"Harmonic","level":2,"score":0.6201263666152954},{"id":"https://openalex.org/C34388435","wikidata":"https://www.wikidata.org/wiki/Q2267362","display_name":"Bounded function","level":2,"score":0.6116681098937988},{"id":"https://openalex.org/C2778572836","wikidata":"https://www.wikidata.org/wiki/Q380933","display_name":"Space (punctuation)","level":2,"score":0.4819731116294861},{"id":"https://openalex.org/C169214877","wikidata":"https://www.wikidata.org/wiki/Q981016","display_name":"Dirichlet distribution","level":3,"score":0.4803118109703064},{"id":"https://openalex.org/C2777299769","wikidata":"https://www.wikidata.org/wiki/Q3707858","display_name":"Type (biology)","level":2,"score":0.4714183509349823},{"id":"https://openalex.org/C129782007","wikidata":"https://www.wikidata.org/wiki/Q162886","display_name":"Euclidean geometry","level":2,"score":0.4615715742111206},{"id":"https://openalex.org/C202444582","wikidata":"https://www.wikidata.org/wiki/Q837863","display_name":"Pure mathematics","level":1,"score":0.4496873915195465},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.44679737091064453},{"id":"https://openalex.org/C42357961","wikidata":"https://www.wikidata.org/wiki/Q213363","display_name":"Open set","level":2,"score":0.44442349672317505},{"id":"https://openalex.org/C2779560616","wikidata":"https://www.wikidata.org/wiki/Q1192869","display_name":"Dirichlet problem","level":3,"score":0.4283004105091095},{"id":"https://openalex.org/C24743483","wikidata":"https://www.wikidata.org/wiki/Q1154848","display_name":"Potential theory","level":2,"score":0.4215150773525238},{"id":"https://openalex.org/C131770355","wikidata":"https://www.wikidata.org/wiki/Q876215","display_name":"Harmonic analysis","level":2,"score":0.41132861375808716},{"id":"https://openalex.org/C182310444","wikidata":"https://www.wikidata.org/wiki/Q1332643","display_name":"Boundary value problem","level":2,"score":0.16840076446533203},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.0},{"id":"https://openalex.org/C41895202","wikidata":"https://www.wikidata.org/wiki/Q8162","display_name":"Linguistics","level":1,"score":0.0},{"id":"https://openalex.org/C18903297","wikidata":"https://www.wikidata.org/wiki/Q7150","display_name":"Ecology","level":1,"score":0.0},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.0},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1016/s0021-9045(02)00018-7","is_oa":true,"landing_page_url":"https://doi.org/10.1016/s0021-9045(02)00018-7","pdf_url":"https://www.sciencedirect.com/science/article/pii/S0021904502000187/pdf","source":{"id":"https://openalex.org/S35093870","display_name":"Journal of Approximation Theory","issn_l":"0021-9045","issn":["0021-9045","1096-0430"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310320990","host_organization_name":"Elsevier BV","host_organization_lineage":["https://openalex.org/P4310320990"],"host_organization_lineage_names":["Elsevier BV"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Approximation Theory","raw_type":"journal-article"},{"id":"pmh:oai:pub.uni-bielefeld.de:1612641","is_oa":false,"landing_page_url":"https://pub.uni-bielefeld.de/record/1612641","pdf_url":null,"source":{"id":"https://openalex.org/S4306401671","display_name":"PUB \u2013 Publications at Bielefeld University (Bielefeld University)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I20121455","host_organization_name":"Bielefeld University","host_organization_lineage":["https://openalex.org/I20121455"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Hansen W, Netuka I. Harmonic approximation and Sarason's-type theorem. <em>Journal of Approximation Theory</em>. 2003;120(1):183-190.","raw_type":"info:eu-repo/semantics/article"}],"best_oa_location":{"id":"doi:10.1016/s0021-9045(02)00018-7","is_oa":true,"landing_page_url":"https://doi.org/10.1016/s0021-9045(02)00018-7","pdf_url":"https://www.sciencedirect.com/science/article/pii/S0021904502000187/pdf","source":{"id":"https://openalex.org/S35093870","display_name":"Journal of Approximation Theory","issn_l":"0021-9045","issn":["0021-9045","1096-0430"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310320990","host_organization_name":"Elsevier BV","host_organization_lineage":["https://openalex.org/P4310320990"],"host_organization_lineage_names":["Elsevier BV"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Approximation Theory","raw_type":"journal-article"},"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W1969028136.pdf","grobid_xml":"https://content.openalex.org/works/W1969028136.grobid-xml"},"referenced_works_count":5,"referenced_works":["https://openalex.org/W393484738","https://openalex.org/W1554669608","https://openalex.org/W1972298315","https://openalex.org/W2041206012","https://openalex.org/W2572374199"],"related_works":["https://openalex.org/W1977410499","https://openalex.org/W2043363028","https://openalex.org/W2045379807","https://openalex.org/W4319319848","https://openalex.org/W2963891167","https://openalex.org/W2379505354","https://openalex.org/W2146515424","https://openalex.org/W2025699070","https://openalex.org/W2150834087","https://openalex.org/W2121866816"],"abstract_inverted_index":null,"counts_by_year":[],"updated_date":"2026-08-02T14:50:37.381335","created_date":"2025-10-10T00:00:00"}