{"id":"https://openalex.org/A5000231245","orcid":null,"observed_orcids":[],"display_name":"Yitwah Cheung","raw_author_names":["Cheung, Yitwah","YITWAH CHEUNG","Yitwah CHEUNG","Yitwah Cheung","Yitwah. Cheung (7954985)"],"full_name":"Cheung, Yitwah","works_count":22,"cited_by_count":348,"summary_stats":{"2yr_mean_citedness":2.5,"h_index":11,"i10_index":13},"ids":{"openalex":"https://openalex.org/A5000231245","orcid":null,"observed_orcids":[]},"affiliations":[{"institution":{"id":"https://openalex.org/I111979921","ror":"https://ror.org/000e0be47","display_name":"Northwestern University","country_code":"US","type":"education","lineage":["https://openalex.org/I111979921"]},"years":[2006,2004,2003]},{"institution":{"id":"https://openalex.org/I40347166","ror":"https://ror.org/024mw5h28","display_name":"University of Chicago","country_code":"US","type":"education","lineage":["https://openalex.org/I40347166"]},"years":[2007,2006]},{"institution":{"id":"https://openalex.org/I71838634","ror":"https://ror.org/05ykr0121","display_name":"San Francisco State University","country_code":"US","type":"education","lineage":["https://openalex.org/I71838634"]},"years":[2019,2013,2011,2010,2008,2007,2006]},{"institution":{"id":"https://openalex.org/I99065089","ror":"https://ror.org/03cve4549","display_name":"Tsinghua University","country_code":"CN","type":"education","lineage":["https://openalex.org/I99065089"]},"years":[2026,2021]}],"last_known_institutions":[{"id":"https://openalex.org/I99065089","ror":"https://ror.org/03cve4549","display_name":"Tsinghua University","country_code":"CN","type":"education","lineage":["https://openalex.org/I99065089"]}],"topics":[{"id":"https://openalex.org/T10588","display_name":"Mathematical Dynamics and Fractals","count":22,"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/T11166","display_name":"Analytic Number Theory Research","count":9,"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/T10304","display_name":"Geometric and Algebraic Topology","count":7,"subfield":{"id":"https://openalex.org/subfields/2608","display_name":"Geometry and Topology"},"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/T12396","display_name":"Advanced Differential Equations and Dynamical Systems","count":7,"subfield":{"id":"https://openalex.org/subfields/2608","display_name":"Geometry and Topology"},"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/T13234","display_name":"p-Adic Analysis and Mathematical Physics","count":7,"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"}}],"topic_share":[{"id":"https://openalex.org/T13234","display_name":"p-Adic Analysis and Mathematical Physics","value":0.0001103,"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/T10588","display_name":"Mathematical Dynamics and Fractals","value":6.94e-05,"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/T11166","display_name":"Analytic Number Theory Research","value":3.98e-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/T10304","display_name":"Geometric and Algebraic Topology","value":3.19e-05,"subfield":{"id":"https://openalex.org/subfields/2608","display_name":"Geometry and Topology"},"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/T12396","display_name":"Advanced Differential Equations and Dynamical Systems","value":3.19e-05,"subfield":{"id":"https://openalex.org/subfields/2608","display_name":"Geometry and Topology"},"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":0.9387929439544678},{"id":"202444582","wikidata":"https://www.wikidata.org/wiki/Q837863","display_name":"Pure mathematics","score":0.6693865656852722},{"id":"114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","score":0.62034672498703},{"id":"134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","score":0.5717864632606506},{"id":"2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","score":0.40684932470321655}],"counts_by_year":[{"year":2003,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2004,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2006,"works_count":4,"oa_works_count":4,"cited_by_count":0},{"year":2007,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":2008,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2010,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2011,"works_count":3,"oa_works_count":2,"cited_by_count":0},{"year":2012,"works_count":0,"oa_works_count":0,"cited_by_count":9},{"year":2013,"works_count":2,"oa_works_count":2,"cited_by_count":11},{"year":2014,"works_count":0,"oa_works_count":0,"cited_by_count":12},{"year":2015,"works_count":0,"oa_works_count":0,"cited_by_count":18},{"year":2016,"works_count":1,"oa_works_count":0,"cited_by_count":14},{"year":2017,"works_count":0,"oa_works_count":0,"cited_by_count":25},{"year":2018,"works_count":0,"oa_works_count":0,"cited_by_count":15},{"year":2019,"works_count":1,"oa_works_count":1,"cited_by_count":14},{"year":2020,"works_count":0,"oa_works_count":0,"cited_by_count":17},{"year":2021,"works_count":1,"oa_works_count":1,"cited_by_count":22},{"year":2022,"works_count":0,"oa_works_count":0,"cited_by_count":26},{"year":2023,"works_count":0,"oa_works_count":0,"cited_by_count":18},{"year":2024,"works_count":2,"oa_works_count":2,"cited_by_count":22},{"year":2025,"works_count":1,"oa_works_count":1,"cited_by_count":25},{"year":2026,"works_count":1,"oa_works_count":1,"cited_by_count":41}],"display_name_alternatives":["Cheung, Yitwah","YITWAH CHEUNG","Yitwah CHEUNG","Yitwah Cheung","Yitwah. Cheung (7954985)"],"block_key":"y cheung","works_api_url":"https://api.openalex.org/works?filter=author.id:A5000231245","awards_count":0,"updated_date":"2026-11-09T14:06:01","created_date":"2016-06-24T00:00:00"}