{"id":73,"date":"2022-09-20T12:02:14","date_gmt":"2022-09-20T12:02:14","guid":{"rendered":"https:\/\/www.ibs.re.kr\/ecopro\/zixiangxu\/?page_id=73"},"modified":"2026-04-22T00:57:13","modified_gmt":"2026-04-22T00:57:13","slug":"activities","status":"publish","type":"page","link":"https:\/\/www.ibs.re.kr\/ecopro\/zixiangxu\/activities\/","title":{"rendered":"Activities"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Referee for the following journals<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Mathematics Reviews (Reviewer Number 172025)<\/li>\n\n\n\n<li>Acta Mathematica Hungarica<\/li>\n\n\n\n<li>Bulletin of the Brazilian Mathematical Society<\/li>\n\n\n\n<li>Combinatorica <\/li>\n\n\n\n<li>Discrete Computational Geometry<\/li>\n\n\n\n<li>Designs Codes and Cryptography<\/li>\n\n\n\n<li>Discrete Mathematics (4)<\/li>\n\n\n\n<li>European Journal of Combinatorics (3)<\/li>\n\n\n\n<li>Electronic Journal of Combinatorics (2)<\/li>\n\n\n\n<li>IEEE Transactions on Information Theory (6)<\/li>\n\n\n\n<li>IEEE International Symposium on Information Theory (ISIT2026, 2)\u00a0<\/li>\n\n\n\n<li>Journal of Combinatorial Theory, Series A (4)<\/li>\n\n\n\n<li>Journal of Combinatorial Theory, Series B<\/li>\n\n\n\n<li>Journal of the Operations Research Society of China<\/li>\n\n\n\n<li>Journal of Graph Theory (3)<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Talks<\/h2>\n\n\n\n<p><mark class=\"has-inline-color has-luminous-vivid-orange-color\">I enjoy the wonderful time I have spent engaging in academic research, and I am also grateful for any invitations from academic institutions and hosts that have invited me to visit.<\/mark><\/p>\n\n\n\n<p><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>December 22-24, Uniform set systems with small VC-dimension, invited talk, 35th&nbsp;KIAS Combinatorics Workshop, Haeundae, Busan, Korea<\/li>\n\n\n\n<li>December 16, Extremal and stability results for Turan-type problems, Zhejiang University, Hangzhou, China<\/li>\n\n\n\n<li>November 14, Multilinear polynomial methods and some applications in combinatorics, invited talk, Soochow University, Suzhou, China<\/li>\n\n\n\n<li>November 14, VC-dimension in graph theory, invited talk, Xi&#8217;an Jiaotong-Liverpool University, Suzhou, China<\/li>\n\n\n\n<li>October 17-20, 2025, Canonical Ramsey for various configurations, 3-th Workshop on Combinatorics, Great Bay University, Dongguan China.<\/li>\n\n\n\n<li>October 10, 2025, When can a large H-free graph be homomorphic to a small one? Invited talk, NUAA, Nanjing, China.<\/li>\n\n\n\n<li>September 17, 2025, Polynomial methods in combinatorics, AMSS, CAS<\/li>\n\n\n\n<li>September 13, 2025, Uniform set systems with small VC-dimension, Nankai University<\/li>\n\n\n\n<li>September 10, 2025, <strong>VC-dimension in Combinatorics<\/strong>, BIT<\/li>\n\n\n\n<li>August 20-23, 2025, Uniform set systems with small VC-dimension, Invited talk, The 13th Cross-Strait Graph Theory and Combinatorics Conference, Zhejiang University, Hangzhou.<\/li>\n\n\n\n<li>April 30, 2025, <strong>VC-dimension in Combinatorics<\/strong>, Xi\u2019an Jiaotong University.<\/li>\n\n\n\n<li>April 29, 2025, <strong>Uniform set systems with small VC-dimension<\/strong>, Northwestern University of Technology.<\/li>\n\n\n\n<li>April 3, 2025, <strong>Uniform set systems with small VC-dimension<\/strong>, Guangdong<\/li>\n\n\n\n<li>March 27-30, 2025, <strong>Dense graphs without certain subgraphs: structural insights and thresholds&nbsp;<\/strong>4th East Asia Workshop on Extremal and Structural Graph Theory, &nbsp;Sun Yat-sen University, Guangzhou.<\/li>\n\n\n\n<li>March, 2025, <strong>VC-dimension and its applications in extremal combinatorics<\/strong>. Shanghai.<\/li>\n\n\n\n<li>February 28, 2025, <strong>Uniform set systems with small VC-dimension<\/strong>, Taiyuan University of Technology, Taiyuan.<\/li>\n\n\n\n<li>October 22-24,2024,  <strong>Dense graphs without small odd cycles<\/strong>, Jinan and Qingdao, Shandong University<\/li>\n\n\n\n<li>September 9, 2024, <strong>Theory of VC-dimension and its applications<\/strong>, Invited talk, Xidian University, Xi\u2019an<\/li>\n\n\n\n<li>June 25,2024, <strong>On Bollob\u00e1s-Erd\u0151s-Tuza conjecture<\/strong>, Combinatorial seminar, Shandong University, Qingdao<\/li>\n\n\n\n<li>June 22,2024, <strong>Hitting all maximum independent sets<\/strong>. Workshop on extremal combinatorics and extremal set theory. Taiyuan University of Technology, Taiyuan<\/li>\n\n\n\n<li>May 13,2024, <strong>On Bollob\u00e1s-Erd\u0151s-Tuza conjecture<\/strong>. SDU-IBS joint workshop, Shandong University, Jinan.<\/li>\n\n\n\n<li>May 6-7, 2024, <strong>Structures with bounded VC-dimension: From theory to applications.<\/strong> Lectures, Tianyuan Mathematics Research Center, Kunming<\/li>\n\n\n\n<li>April 25,2024, <strong><em>Theoretical bounds and stability results on set systems.<\/em><\/strong> Combinatorial seminar, Northwestern University of Technology.<\/li>\n\n\n\n<li>April 21,2024, <strong>Hitting all maximum independent sets<\/strong>. Conference on Digraphs, Nankai University.<\/li>\n\n\n\n<li>April 18, 2024, <strong>An introduction to bipartite Turan problems<\/strong>, Combinatorial seminar, Nankai University<\/li>\n\n\n\n<li>March 01, 2024, <strong>Towards Bollob\u00e1s-Erd\u0151s-Tuza conjecture<\/strong>, Fuzhou University<\/li>\n\n\n\n<li>October 28-29, 2023,&nbsp;KMS Annual Meeting, Korean Mathematical Society, Seoul National University, Seoul. <strong>When can a large Kr-free graph be homomorphic to a small one?<\/strong><\/li>\n\n\n\n<li>October 26, 2023, Shandong University, Qingdao. <strong>An extremal problem on k-neighborly family of boxes<\/strong><\/li>\n\n\n\n<li>October 25, 2023 Shandong University, Jinan. <strong>Structure of Kr-free graphs<\/strong>.<\/li>\n\n\n\n<li>October 20-23, 2023: 3rd Developments in Combinatorics Workshop, Jeju. <strong>Combinatorial proof of Graham-Pollak Theorem<\/strong>,<\/li>\n\n\n\n<li>September 17, 2023, Youth Forum at Chinese Academy of Sciences, Beijing, China. <em><strong><strong><em>Tur\u00e1n<\/em><\/strong> number of bipartite graphs from geometric shapes.<\/strong><\/em><\/li>\n\n\n\n<li>September 15, 2023, invited talk at Nankai University, Tianjin, China. <strong><em>On a new variant of the Erd\u0151s\u2013Gy\u00e1rf\u00e1s problem&nbsp;<\/em><\/strong><\/li>\n\n\n\n<li>August 24, 2023, talk in ICIAM 2023, Waseda University, Tokyo, Japan. <strong><em>Robust Linear algebra methods and some applications.<\/em><\/strong><\/li>\n\n\n\n<li>August 19, 2023, invited talk in  workshop at Yokohama National University, Yokohama, Japan.  <strong><em>An Extremal problem related to Graham-Pollak Theorem.<\/em><\/strong><\/li>\n\n\n\n<li>August 7, 2023, Invited talk, Shandong University, Qingdao, China. <strong><em>Theoretical bounds and stability results on set systems.<\/em><\/strong><\/li>\n\n\n\n<li>July 27, 2023, OSRC 2023 Graph Theory and Combinatorics, Taiyuan, China. <strong><em>Tur\u00e1n number of graphs from geometric shapes.<\/em><\/strong><\/li>\n\n\n\n<li>July 24, 2023, Youth Forum, Shandong University, Jinan, China. <strong><em>An extremal problem related to Graham-Pollak Theorem.<\/em><\/strong><\/li>\n\n\n\n<li>January 10, 2023, Invited talk, Shandong University, Jinan, China. <strong><em>Algebraic methods in intersective sets and set systems<\/em><\/strong><\/li>\n\n\n\n<li>January 3, 2023, Invited talk, Taiyuan University of Technology, Taiyuan, China. <strong><em>Theoretical bounds and stability results on set systems<\/em><\/strong><\/li>\n\n\n\n<li>October 22, 2022, Forum on Extremal Combinatorics and Information Theory at Soochow University, Suzhou, China.<strong><em> Intersective sets over abelian groups<\/em><\/strong><\/li>\n\n\n\n<li>September 30, 2022, Combinatorics Workshop 2022 at GIST, Gwangju, South Korea. <strong><em>Intersective sets over abelian groups<\/em><\/strong><\/li>\n\n\n\n<li>October 27,2021, Invited talk in the 1-st Workshop on Developments in Combinatorics, Shandong University, online. <strong><em>On color isomorphic patterns in proper colorings<\/em><\/strong><\/li>\n\n\n\n<li>May 22, 2021, The 10-th International Symposium on Finite Fields and Their Applications, Luoyang. <strong><em>Erd\u0151s-Falconer distance problem under Hamming metric.<\/em><\/strong><\/li>\n\n\n\n<li>October 20, 2020, invited talk, Shandong University, Jinan China. <strong><em>A brief introduction to the random algebraic methods.<\/em><\/strong><\/li>\n\n\n\n<li>October 4, 2020, Invited talk, Taiyuan University of Technology, Taiyuan, China. <strong><em>On color-isomorphic patterns in proper-edge colorings.<\/em><\/strong><\/li>\n\n\n\n<li>June 20, 2019, The 1-st Young Scholars Forum on Combinatorics and Graph Theory, Fuzhou University. <strong><em>Some extremal results on hypergraph Tur\u00e1n problems.<\/em><\/strong><\/li>\n\n\n\n<li>May 12, 2019, The 6-th International Conference of Coding, Cryptography and Combinatorics, Wuhan. <strong><em>New theoretical bounds and constructions of permutation codes under block permutation metric<\/em><\/strong><br><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Teaching<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>2021 Fall:  Extremal Combinatorics <\/li>\n\n\n\n<li>2021 Spring: Combinatorial Designs<\/li>\n\n\n\n<li>2020 Fall: Extremal Combinatorics<\/li>\n\n\n\n<li>2020 Spring: Combinatorial Designs<\/li>\n\n\n\n<li>2019 Fall: Extremal Combinatorics<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Referee for the following journals Talks I enjoy the wonderful time I have spent engaging in academic research, and I am also grateful for any invitations from academic institutions and hosts that have invited me to visit. Teaching<\/p>\n","protected":false},"author":12,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-73","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.ibs.re.kr\/ecopro\/zixiangxu\/wp-json\/wp\/v2\/pages\/73","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ibs.re.kr\/ecopro\/zixiangxu\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.ibs.re.kr\/ecopro\/zixiangxu\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.ibs.re.kr\/ecopro\/zixiangxu\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ibs.re.kr\/ecopro\/zixiangxu\/wp-json\/wp\/v2\/comments?post=73"}],"version-history":[{"count":60,"href":"https:\/\/www.ibs.re.kr\/ecopro\/zixiangxu\/wp-json\/wp\/v2\/pages\/73\/revisions"}],"predecessor-version":[{"id":687,"href":"https:\/\/www.ibs.re.kr\/ecopro\/zixiangxu\/wp-json\/wp\/v2\/pages\/73\/revisions\/687"}],"wp:attachment":[{"href":"https:\/\/www.ibs.re.kr\/ecopro\/zixiangxu\/wp-json\/wp\/v2\/media?parent=73"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}