{"id":"https://openalex.org/A5031609050","orcid":"https://orcid.org/0000-0002-7242-5329","observed_orcids":["https://orcid.org/0000-0002-7242-5329"],"display_name":"M. Ant\u00f3nia D\u00fcffner","raw_author_names":["M. A. Duffner","M. Antonia Duffner","M. Ant\u00f3nia","M. Ant\u00f3nia Duffner","M. Ant\u00f3nia D\u00fcffner","M.A. Duffner","M.Ant\u00f3nia Duffner","Maria Ant\u00f3nia Duffner"],"full_name":"Maria Ant\u00f3nia Duffner","works_count":21,"cited_by_count":123,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":6,"i10_index":5},"ids":{"openalex":"https://openalex.org/A5031609050","orcid":"https://orcid.org/0000-0002-7242-5329","observed_orcids":["https://orcid.org/0000-0002-7242-5329"]},"affiliations":[{"institution":{"id":"https://openalex.org/I141596103","ror":"https://ror.org/01c27hj86","display_name":"University of Lisbon","country_code":"PT","type":"education","lineage":["https://openalex.org/I141596103"]},"years":[2023,2021,2019,2017,2016,2014,2013,2012,2006,2004,2003,2001,1997,1994]},{"institution":{"id":"https://openalex.org/I76903346","ror":"https://ror.org/04z8k9a98","display_name":"University of Coimbra","country_code":"PT","type":"education","lineage":["https://openalex.org/I76903346"]},"years":[1992]}],"last_known_institutions":[{"id":"https://openalex.org/I141596103","ror":"https://ror.org/01c27hj86","display_name":"University of Lisbon","country_code":"PT","type":"education","lineage":["https://openalex.org/I141596103"]}],"topics":[{"id":"https://openalex.org/T10792","display_name":"Matrix Theory and Algorithms","count":21,"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/T10948","display_name":"Advanced Combinatorial Mathematics","count":16,"subfield":{"id":"https://openalex.org/subfields/2607","display_name":"Discrete Mathematics and Combinatorics"},"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/T10849","display_name":"Finite Group Theory Research","count":13,"subfield":{"id":"https://openalex.org/subfields/2607","display_name":"Discrete Mathematics and Combinatorics"},"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","count":8,"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/T10884","display_name":"Holomorphic and Operator Theory","count":2,"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"}}],"topic_share":[{"id":"https://openalex.org/T10792","display_name":"Matrix Theory and Algorithms","value":7.33e-05,"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/T10849","display_name":"Finite Group Theory Research","value":6.94e-05,"subfield":{"id":"https://openalex.org/subfields/2607","display_name":"Discrete Mathematics and Combinatorics"},"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","value":4.38e-05,"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/T10948","display_name":"Advanced Combinatorial Mathematics","value":3.91e-05,"subfield":{"id":"https://openalex.org/subfields/2607","display_name":"Discrete Mathematics and Combinatorics"},"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/T12303","display_name":"Tensor decomposition and applications","value":2.65e-05,"subfield":{"id":"https://openalex.org/subfields/2605","display_name":"Computational Mathematics"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"x_concepts":[{"id":"33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","score":0.9320683479309082},{"id":"114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","score":0.8017906546592712},{"id":"202444582","wikidata":"https://www.wikidata.org/wiki/Q837863","display_name":"Pure mathematics","score":0.5567168593406677},{"id":"136119220","wikidata":"https://www.wikidata.org/wiki/Q1000660","display_name":"Algebra over a field","score":0.5096800327301025},{"id":"2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","score":0.1615404486656189}],"counts_by_year":[{"year":1992,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1994,"works_count":2,"oa_works_count":2,"cited_by_count":0},{"year":1997,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":1998,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2001,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2003,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2004,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2006,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2012,"works_count":1,"oa_works_count":1,"cited_by_count":14},{"year":2013,"works_count":1,"oa_works_count":1,"cited_by_count":5},{"year":2014,"works_count":1,"oa_works_count":1,"cited_by_count":4},{"year":2016,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2017,"works_count":2,"oa_works_count":1,"cited_by_count":4},{"year":2018,"works_count":0,"oa_works_count":0,"cited_by_count":3},{"year":2019,"works_count":1,"oa_works_count":0,"cited_by_count":8},{"year":2020,"works_count":0,"oa_works_count":0,"cited_by_count":7},{"year":2021,"works_count":2,"oa_works_count":1,"cited_by_count":17},{"year":2023,"works_count":1,"oa_works_count":0,"cited_by_count":3},{"year":2024,"works_count":0,"oa_works_count":0,"cited_by_count":11},{"year":2025,"works_count":0,"oa_works_count":0,"cited_by_count":7},{"year":2026,"works_count":0,"oa_works_count":0,"cited_by_count":2}],"display_name_alternatives":["M. A. Duffner","M. Antonia Duffner","M. Ant\u00f3nia","M. Ant\u00f3nia Duffner","M. Ant\u00f3nia D\u00fcffner","M.A. Duffner","M.Ant\u00f3nia Duffner","Maria Ant\u00f3nia Duffner"],"block_key":"m duffner","works_api_url":"https://api.openalex.org/works?filter=author.id:A5031609050","updated_date":"2026-10-31T12:29:50","created_date":"2016-06-24T00:00:00"}
