{"id":"https://openalex.org/W1971197856","doi":"https://doi.org/10.1007/bf02007567","title":"Die Nichtkonstruktivit\u00e4t des Brouwerschen Fixpunktsatzes","display_name":"Die Nichtkonstruktivit\u00e4t des Brouwerschen Fixpunktsatzes","publication_year":1985,"publication_date":"1985-12-01","ids":{"openalex":"https://openalex.org/W1971197856","doi":"https://doi.org/10.1007/bf02007567","mag":"1971197856"},"language":"de","primary_location":{"id":"doi:10.1007/bf02007567","is_oa":false,"landing_page_url":"https://doi.org/10.1007/bf02007567","pdf_url":null,"source":{"id":"https://openalex.org/S188076996","display_name":"Archive for Mathematical Logic","issn_l":"0933-5846","issn":["0933-5846","1432-0665"],"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":"Archiv f\u00fcr Mathematische Logik und Grundlagenforschung","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/A5006234321","display_name":"G\u00fcnter Baigger","orcid":null},"institutions":[{"id":"https://openalex.org/I2802414967","display_name":"Swiss Insurance Association","ror":"https://ror.org/053ae3r23","country_code":"CH","type":"other","lineage":["https://openalex.org/I2802414967"]}],"countries":["CH"],"is_corresponding":true,"raw_author_name":"G\u00fcnter Baigger","raw_affiliation_strings":["c/o VITA Lebensversicherungs-Gesellschaft, Austra\u00dfe 46, CH-8022, Z\u00fcrich, Schweiz","c/o VITA Lebensversicherungs-Gesellschaft, Z\u00fcrich, Schweiz"],"affiliations":[{"raw_affiliation_string":"c/o VITA Lebensversicherungs-Gesellschaft, Austra\u00dfe 46, CH-8022, Z\u00fcrich, Schweiz","institution_ids":["https://openalex.org/I2802414967"]},{"raw_affiliation_string":"c/o VITA Lebensversicherungs-Gesellschaft, Z\u00fcrich, Schweiz","institution_ids":["https://openalex.org/I2802414967"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5006234321"],"corresponding_institution_ids":["https://openalex.org/I2802414967"],"apc_list":{"value":2390,"currency":"EUR","value_usd":2990},"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":15,"citation_normalized_percentile":{"value":0.09672101,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":"25","issue":"1","first_page":"183","last_page":"188"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12002","display_name":"Computability, Logic, AI Algorithms","score":0.9907000064849854,"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/T12002","display_name":"Computability, Logic, AI Algorithms","score":0.9907000064849854,"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/T12923","display_name":"Digital Image Processing Techniques","score":0.9128999710083008,"subfield":{"id":"https://openalex.org/subfields/1707","display_name":"Computer Vision and Pattern Recognition"},"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":0.6325235962867737},{"id":"https://openalex.org/keywords/algebra-over-a-field","display_name":"Algebra over a field","score":0.37532249093055725},{"id":"https://openalex.org/keywords/pure-mathematics","display_name":"Pure mathematics","score":0.23472976684570312}],"concepts":[{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.6325235962867737},{"id":"https://openalex.org/C136119220","wikidata":"https://www.wikidata.org/wiki/Q1000660","display_name":"Algebra over a field","level":2,"score":0.37532249093055725},{"id":"https://openalex.org/C202444582","wikidata":"https://www.wikidata.org/wiki/Q837863","display_name":"Pure mathematics","level":1,"score":0.23472976684570312}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1007/bf02007567","is_oa":false,"landing_page_url":"https://doi.org/10.1007/bf02007567","pdf_url":null,"source":{"id":"https://openalex.org/S188076996","display_name":"Archive for Mathematical Logic","issn_l":"0933-5846","issn":["0933-5846","1432-0665"],"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":"Archiv f\u00fcr Mathematische Logik und Grundlagenforschung","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":2,"referenced_works":["https://openalex.org/W1975452830","https://openalex.org/W4231629838"],"related_works":["https://openalex.org/W1979597421","https://openalex.org/W2007980826","https://openalex.org/W4245490552","https://openalex.org/W4225152035","https://openalex.org/W2061531152","https://openalex.org/W3002753104","https://openalex.org/W2077600819","https://openalex.org/W1587224694","https://openalex.org/W2911598644","https://openalex.org/W2142036596"],"abstract_inverted_index":null,"counts_by_year":[{"year":2018,"cited_by_count":2},{"year":2016,"cited_by_count":2},{"year":2015,"cited_by_count":1},{"year":2014,"cited_by_count":1},{"year":2013,"cited_by_count":1},{"year":2012,"cited_by_count":1}],"updated_date":"2026-03-10T16:38:18.471706","created_date":"2025-10-10T00:00:00"}