Activities

<Presentations>

• Apr. 6, 2024 - 98th KPPY Combinatorics Workshop (Kyungpook National University, Republic of Korea) : On the interval coloring impropriety of graphs

• Feb. 15, 2024 - Combinatorics Seminar (Yeungnam University, Gyeongsan, Republic of Korea) : Domination of subcubic planar graphs with large girth

• Jul. 24, 2023 - Graduate Research Workshop in Combinatorics (GRWC) 2023 (University of Wyoming, Wyoming, U.S.A.) : Proper h-conflict-free coloring and odd coloring of planar graphs

• Jul. 17, 2023 - 2nd Workshop on Combinatorics and Graphs (Yeungnam University, Gyeongsan, Republic of Korea) : Independent domination and packing in subcubic graphs

• Jan. 18, 2023 - Gyeonggi-Incheon Combinatorics Workshop 2022/23 (GICW 2022/23) (Inha University, Incheon, Republic of Korea) : Domination of subcubic planar graphs with large girth 

• Dec. 21, 2022 - The 26th KIAS Combinatorics Workshop (Shilla Stay Haeundae, Busan, Republic of Korea) : A proper h-conflict-free coloring and an odd coloring of a graph

• Dec. 16, 2022 - 2nd  PYM Workshop on Mathematical Sciences (Jeju National University, Jeju, Republic of Korea) : Odd coloring and proper h-conflict-free coloring of a graph

• Oct. 31, 2022 - 2022 DIMAG and ECOPRO Joint Workshop (Yeosu, Republic of Korea) : Independent domination number of a graph with degree restriction

• Oct. 19, 2022 - 2022 Global KMS International Conference (New Challenges for the Korean Mathematics Community as a IMU memeber of Group 5) (2022년도 대한수학회 정기총회 및 IMU 승급 기념 국제학회) (Online) : Odd coloring and proper conflict-free coloring of a sparse graph

• Aug. 26, 2022 - 1st Workshop on Combinatorics and Graphs (조합론과 그래프에 관한 첫번째 워크샵) (Yeungnam University, Gyeongsan, Republic of Korea) : Odd coloring and proper conflict-free coloring of a graph

• Jul. 26, 2022 - Graduate Research Workshop in Combinatorics (GRWC) 2022 (Denver, U.S.A.) : Intersection of two longest paths in a graph with given connectivity

• Jun. 27, 2022 - 4th Workshop on Graph Colourings (Pilsen, Czech Republic) : Partitioning a planar graph without 4-cycles and 5-cycles into bounded degree forests

• Dec. 7, 2021 - Discrete Math Seminar (IBS Discrete Mathematics Group, Daejeon, Republic of Korea) : Independent domination of graphs with bounded maximum degree

• Oct. 21, 2021 - 2021 KMS Annual Meeting (2021년 대한수학회 정기총회 및 가을 연구발표회) (Online) : On independent domination of regular graphs

• Jul. 16, 2021 - 2021  Kangwon-Kyungki Mathematical Society Meeting (2021년도 강원경기수학회 학술대회 및 정기총회) (Online) : Intersection of two longest paths in k-connected graphs

• Feb. 26, 2021 - KPPY Combinatorics Workshop (Online) : Intersection of two longest paths in k-connected graphs

• Nov. 27, 2020 - 2020 Gyeonggi-Incheon Combinatorics Workshop (2020 GICW) (2020 경기인천 조합론 학회) (Online) : Improvements on Hippchen's conjecture

• Sep. 26, 2020 - 2020 Youngnam Mathematical Society Annual Meeting (2020 영남수학회 정기총회 및 연구발표회) (Online) : Partitioning planar graphs without 4-cycles and 5-cycles into two forests with bounded maximum degrees

• Sep. 4, 2020 - Kangwon-Kyungki Mathematical Society Meeting (2020년도 강원경기수학회 학술 발표대회) (Online) : Partitioning planar graphs without 4-cycles and 5-cycles into two forests with bounded maximum degrees

• Aug. 10, 2020 - Open Seminar on Algebras, Combinatorics and Algorithms (OSACA) (Pusan National University, Republic of Korea) : Partitioning planar graphs without 4-cycles and 5-cycles into two forests with bounded maximum degrees

• Jul. 3, 2020 - 2020 KMS Spring Meeting (2020년도 대한수학회 봄 연구발표회) (Online) : Partitioning planar graphs without 4-cycles and 5-cycles into two forests with bounded maximum degrees

• Mar. 3, 2020 - Discrete Math Seminar (IBS Discrete Mathematics Group, Republic of Korea) : Decomposition of a planar graph into a d-degenerate graph and a graph with maximum degree at most h

• Jan. 9, 2020 - Discrete Math Seminar (Zhejiang Normal University, China) : Vertex partitioning planar graphs without 4-cycles and 5-cycles

• Dec. 27, 2019 - Open Seminar on Algebras, Combinatorics and Algorithms (OSACA) (Pusan National University, Republic of Korea) : Vertex partitioning planar graphs without 4-cycles and 5-cycles

• Dec. 19, 2019 - Riemannian and Complex Geometry seminar (KIAS, Republic of Korea) : On path-induced-saturated graphs

• Dec. 14, 2019 - 95th KPPY Combinatorics Workshop (Yeungnam University, Republic of Korea) : Planar graphs with no 4-cycles and 5-cycles are (3,4)-colorable

• Aug. 13, 2019 - 2019 Combinatorics Workshop (Hotel Skypark, Songdo, Incheon, Republic of Korea) : On the existence of path-induced-saturated graphs

• Jun. 29, 2019 - 2019 Kangwon-Kyungki and Yeungnam Mathematical Society (DGDC, Republic of Korea) : On a path induced-saturated graph

• Jun. 24, 2019 - The 127th Open Seminar on Algebras, Combinatorics and Algorithms (OSACA) (Pusan National University, Republic of Korea) : On the existence of path-induced-saturated graphs

• May 20, 2019 - Colloquium of Math Department (National Central University, Taiwan) : On induced saturated graphs

• Mar. 15, 2019 - Topology and Combinatorics seminar at Ajou University (Ajou University, Republic of Korea) : A characterization of the groups whose proper Schur rings are commutative

• Aug. 31, 2018 - 88th KPPY Combinatorics Workshop (Yeungnam University, Republic of Korea) : On sharp sufficient conditions for the existence of an even [a,b]-factor in a graph

• Aug. 10, 2018 - Graphs and Groups, Representations and Relations (Novosibirsk State University, Russia) : Groups whose proper Schur rings are commutative

• Jun. 29, 2018 - 2018 The 15th KWMS International Conference (KIAS, Republic of Korea) : Sharp conditions for the existence of an even [a,b]-factor in a graph

• Dec. 14, 2017 - The 6th Mini Section of the KPPY Combinatorics Seminar (Yeungnam University, Republic of Korea) : On finding minimal non-nice graphs

• Jun. 22, 2017 - 2017 the 13th KWMS International Conference (POSTECH, Republic of Korea) : On groups whose proper Schur rings are commutative

• May 31, 2017 - Junior Math Colloquium (Pusan National University, Republic of Korea) : On Groups Whose Proper Schur Rings Are Commutative

• Apr. 29, 2017 - 2017 KMS Spring meeting (Chosun University, Republic of Korea) : Commutativity of a Schur ring over some groups

• Feb. 21, 2017 - 81st KPPY Combinatorics Workshop (Pusan National University, Republic of Korea) : On finite groups which induces only commutative proper Schur rings

• Dec. 2, 2016 - PNU MATH FORUM 2016 (Pusan National University, Republic of Korea) : On a Dedekind Property of a Schur ring

• Jul. 28, 2016 - The Asian Mathematical Conference 2016 (Bali Nusa Dua Convention Center, Bali, Indonesia) : On a generalization of an Abelian ring

• Jul. 21, 2016 - The 82nd Open Seminar on Algebras, Combinatorics and Algorithms(OSACA) (Pusan National University, Republic of Korea) : On a generalization of an Abelian ring

• Jun. 25, 2016 - Yeungnam Mathematical Society (Keimyung University, Republic of Korea) : Some characterizations for a group ring under certain properties

• Apr. 23, 2016 - 2016 KMS Spring meeting (Sung Kyun Kwan University, Republic of Korea) : On Group Rings that are Noncommutative

• Apr. 2, 2016 - 2016 The Korean Society of Mathematical Education (Pusan National University, Republic of Korea) : On Quaternion Group Rings over a Field

• Feb. 24, 2016 - Junior Math Colloquium (Pusan National University, Republic of Korea) : On Noncommutative Group Rings

• Jul. 29, 2015 - The 9th Graduate Student Workshop on Mathematics (Osaka City University, Osaka, Japan) : On NI-rings and relations among π-regular rings and its related rings

• Jul. 15, 2015 - PNU MATH FORUM 2015 (Pusan National University, Republic of Korea) : On NI-rings and relations among π-regular rings and its related rings

• Jun. 27, 2015 - 2015 Yeungnam Mathematical Society (Pusan National University, Republic of Korea) : Some results on a near-ring related to semicentral idempotents

• May 28, 2015 - The 53rd Open Seminar on Algebras, Combinatorics and Algorithms (OSACA) (Pusan National University, Republic of Korea) : Definitions and some relations of rings and their examples

<Research Visits>

• Jul. 2023 - Minki Kim, Gwangju Institute of Science and Technology (GIST) (Gwangju, Republic of Korea)

• Feb. 2023 - Minki Kim, Gwangju Institute of Science and Technology (GIST) (Gwangju, Republic of Korea)

• Nov. 2022 - Minki Kim, Gwangju Institute of Science and Technology (GIST) (Gwangju, Republic of Korea)

• Dec. 2021 - Sang-il Oum, IBS Discrete Mathematics Group (DIMAG) (Daejeon, Republic of Korea)

• Jan. 2020 - Xuding Zhu, Zhejiang Normal University (Jinhua, Zhejiang, China)

• May 2019 - Wei-Hsuan Yu, National Central University (Taoyuan, Taiwan) 

• Dec. 2018 - Suil O, The State University of New York (SUNY) (Incheon, Republic of Korea) 

• Oct. 2018 - Suil O, The State University of New York (SUNY) (Incheon, Republic of Korea) 

• Sep. 2018 - Suil O, The State University of New York (SUNY) (Incheon, Republic of Korea) 

• Jun. 2018 - Jong Yoon Hyun, Korea Institute For Advanced Study (KIAS) (Seoul, Republic of Korea) 

• Apr. 2018 - Jong Yoon Hyun, Korea Institute For Advanced Study (KIAS) (Seoul, Republic of Korea) 

<Participated conferences, seminars, and schools>

• Apr. 6, 2024 : 98th KPPY Combinatorics Workshop (Kyungpook National University, Republic of Korea)

• Mar. 8 - 9, 2024 : The 30th KIAS Combinatorics Workshop (KIAS, Seoul, Republic of Korea)

• Feb. 15, 2024 : Combinatorics Seminar (Yeungnam University, Gyeongsan, Republic of Korea) 

• Jan. 2, 2024 : Discrete Math Seminar (IBS Discrete Mathematics Group, Daejeon, Republic of Korea)

• Dec. 26 - 28, 2023 : The 29th KIAS Combinatorics Workshop (Shilla Stay Haeundae, Busan, Republic of Korea)

• Aug. 16 - 18, 2023 : 2023 Combinatorics Workshop (Yonsei University, Seoul, Republic of Korea)

• Aug. 8 - 9, 2023 : 2023 KIAS Summer Workshop on Graph Theory (KIAS, Seoul, Republic of Korea)

• Jul. 23 - Aug. 4, 2023 : Graduate Research Workshop in Combinatorics (GRWC) 2023 (University of Wyoming, Wyoming, U.S.A.) 

• Jul. 17 - 18, 2023 : 2nd Workshop on Combinatorics and Graphs (Yeungnam University, Gyeongsan, Republic of Korea) 

• Jun. 18 - 24, 2023 : 10th Slovenian Conference on Graph Theory (Kranjska Gora, Slovenia)

• May. 27, 2023 : EXCILL IV Conference (University of Illinois Urbana-Champaign, Illionois, U.S.A.)

• May. 23 - 26, 2023 : Summer School in Graph Coloring (University of Illinois Urbana-Champaign, Illionois, U.S.A.)

• Feb. 23 - 24, 2023 : The 27th KIAS Combinatorics Workshop (KIAS, Seoul, Republic of Korea)

• Jan. 30 - Feb. 3, 2023 : Winter Workshop in Combinatorics 2023 (Konjiam Resort, Yongin, Republic of Korea)

• Jan. 18, 2023 : Gyeonggi-Incheon Combinatorics Workshop 2022/23 (GICW 2022/23) (Inha University, Incheon, Republic of Korea) 

• Dec. 20 - 22, 2022 : The 26th KIAS Combinatorics Workshop (Shilla Stay Haeundae, Busan, Republic of Korea)

• Dec. 15 - 17, 2022 : 2nd  PYM Workshop on Mathematical Sciences (Jeju National University, Jeju, Republic of Korea)

• Oct. 31 - Nov. 3, 2022 : 2022 DIMAG and ECOPRO Joint Workshop (Yeosu, Republic of Korea)

• Oct. 18 - 21, 2022 : 2022 Global KMS International Conference (New Challenges for the Korean Mathematics Community as a IMU member of Group 5) (2022년도 대한수학회 정기총회 및 IMU 승급 기념 국제학회) (Online & Offline : The Korea Science Technology Center(Seoul) (한국과학기술회관(서울)), Republic of Korea)

• Sep. 30 - Oct. 1, 2022 : 2022 Combinatorics Workshop (Gwangju Institute of Science and Technology (GIST), Republic of Korea)

• Sep. 16 - 17, 2022 : School on Structural Graph Theory in Hanyang University (Hanyang University, Republic of Korea)

• Aug. 26 - 28, 2022 : 1st Workshop on Combinatorics and Graphs (조합론과 그래프에 관한 첫번째 워크샵) (Yeungnam University, Republic of Korea)

• Jul. 24 - Aug. 5, 2022 : Graduate Research Workshop in Combinatorics 2022 (University of Colorado Denver, Denver, U.S.A.)

• Jun. 27 - Jul. 2, 2022 : 4th Workshop on Graph Colourings (Hotel Trend, Pilsen, Czech Republic)

• Jun. 15 - 18, 2022 : The 25th KIAS Combinatorics Workshop (Utop Ubless Hotel, Jeju, Republic of Korea)

• Apr. 28 - 29, 2022 : 2022 KMS Spring Meeting (2022년도 대한수학회 봄 연구발표회) (Online)

• Mar. 12 - 13, 2022 : Virtual Mini-conference on Graph Theory & Combinatorics (Online)

• Feb. 22 - 24, 2022 : The 24th KIAS Combinatorics Workshop (Shilla Stay Haeundae, Republic of Korea)

• Feb. 11, 2022 : Open Seminar on Algebra, Combinatorics, and Algorithms (OSACA) Workshop in honor of Prof. Hirasaka Mitsugu upon his retirement (Hotel Nongshim, Republic of Korea)

• Dec. 20 - 22, 2021 : 2021 Combinatorics Workshop (2021 조합론 학술대회) (Bloomvista in Yangpyeong, Republic of Korea)

• Dec. 7, 2021 : Discrete Math Seminar (IBS Discrete Mathematics Group, Republic of Korea)

• Dec. 2 - 5, 2021 : 2021 KSIAM Annual Meeting (2021년 한국산업응용수학회 정기총회 및 가을학술대회) (Busan BEXCO, Republic of Korea) (Online & Offline Hybrid)

• Oct. 21, 2021 : 2021 KMS Annual Meeting (2021년 대한수학회 정기총회 및 가을 연구발표회) (Online)

• Sep. 24, 2021 : 96th KPPY Combinatorics Workshop (Online)

• Jul. 16, 2021 : 2021 Kangwon-Kyungki Mathematical Society Meeting (2021년도 강원경기수학회 학술대회 및 정기총회) (Online)

• Apr. 29 - 30, 2021 : 2021 KMS Spring Meeting (2021년도 대한수학회 봄 연구발표회) (Online)

• Apr. 28, 2021 : Build a network of young researchers in mathematics (신진연구자를 위한 심포지엄, 수학분야 신진연구자의 네트워크 구축) (Online)

• Feb. 26, 2021 : KPPY Combinatorics Workshop (Online) 

• Nov. 27, 2020 : 2020 Gyeonggi-Incheon Combinatorics Workshop (2020 GICW) (2020 경기인천 조합론 학회) (Online) 

• Oct. 23 - 24, 2020 : 2020 KMS Annual Meeting (2020년도 대한수학회 정기총회 및 가을 연구발표회) (Online)

• Sep. 26, 2020 : 2020 Youngnam Mathematical Society Annual Meeting (2020 영남수학회 정기총회 및 연구발표회) (Online)

• Sep. 4, 2020 : Kangwon-Kyungki Mathematical Society Meeting (2020년도 강원경기수학회 학술 발표대회 및 정기총회) (Online)

• Aug. 24, 2020 : 2020 Combinatorics Workshop (2020 조합론 학술대회) (Online)

• Aug. 10, 2020 : Open Seminar on Algebras, Combinatorics and Algorithms (OSACA) (Pusan National University, Republic of Korea)

• Jul. 3, 2020 : 2020 KMS Spring Meeting (2020년도 대한수학회 봄 연구발표회) (Online)

• Mar. 3, 2020 : Discrete Math Seminar (IBS Discrete Mathematics Group, Republic of Korea)

• Feb. 9 - 21, 2020 : Korean Early Career Researcher Workshop in Combinatorics 6 (KECRWIC6) (KB Ingenium Suwon, Republic of Korea)

• Jan. 9, 2020 : Discrete Math Seminar (Zhejiang Normal University, China) 

• Dec. 27, 2019 : Open Seminar on Algebras, Combinatorics and Algorithms (OSACA) (Pusan National University, Republic of Korea) 

• Dec. 19, 2019 : Riemannian and Complex Geometry seminar (KIAS, Republic of Korea)

• Dec. 14, 2019 : 95th KPPY Combinatorics Workshop (Yeungnam University, Republic of Korea)

• Dec. 13, 2019 : The 8th Mini Section of The KPPY Combinatorics Seminars (Yeungnam University, Republic of Korea)

• Oct. 25 - 27, 2019 : 2019 KMS Annual Meeting (2019년도 대한수학회 정기총회 및 가을 연구발표회) (Hongik University, Republic of Korea)

• Sep. 7, 2019 : 93rd KPPY Combinatorics Workshop (Pusan National University, Republic of Korea)

• Aug. 22 - 23, 2019 : 2019 KWMS The 15th International Conference (2019 한국여성수리과학회 국제학술대회) (Seoul National University, Republic of Korea)

• Aug. 13 - 15, 2019 : 2019 Combinatorics Workshop (2019 조합론 학술대회) (Hotel Skypark Songdo, Republic of Korea)

• Jul. 13 - Aug. 2, 2019 : Korean Early Career Researcher Workshop in Combinatorics 5 (KECRWIC 5) (KB Ingenium Suwon, Republic of Korea)

• Jun. 28-30, 2019 : 2019 Kangwon-Kyungki and Yeungnam Mathematical Society (2019년도 강원경기수학회 - 영남수학회 국제공동학술대회) (DGDC, Republic of Korea) 

• Jun. 24, 2019 : The 127th Open Seminar on Algebras, Combinatorics and Algorithms (OSACA) (Pusan National University, Republic of Korea)

• Jun. 17 - 19, 2019 : 第36回代数的組合せ論シンポジウム (Nagasaki University, Japan)

• May 31, 2019 : Workshop on Graph Coloring and Related Topics (Konkuk University, Republic of Korea)

• Apr. 19 - 20, 2019 : 2019 KMS Spring Meeting (2019년도 대한수학회 봄 연구발표회) (Kangwon National University, Republic of Korea) 

• Mar. 15, 2019 : Topology and Combinatorics seminar at Ajou University (Ajou University, Republic of Korea)

• Jan. 28 - 29, 2019 : 17th Japan-Korea Workshop on Algebra and Combinatorics (JK 2019) (University of Tsukuba (Tokyo Campus), Japan)

• Jan. 13 - 17, 20 - 25, 2019 : Korean Early Career Researcher Workshop in Combinatorics 4 (KECRWIC 4) (KB Ingenium Suwon, Republic of Korea)

• Jan. 11 - 12, 2019 : 91rd KPPY Combinatorics Workshop (Hotel Nongshim Busan, Republic of Korea)

• Dec. 19 - 22, 2018 : The 22nd KIAS Combinatorics Workshop (Shilla Stay Busan, Republic of Korea)

• Nov. 3, 2018 : 90th KPPY Combinatorics Workshop (Kyungpook National University, Republic of Korea)

• Sep. 29, 2018 : 89th KPPY Combinatorics Workshop (Pusan National University, Republic of Korea)

• Aug. 31, 2018 : 88th KPPY Combinatorics Workshop (Yeungnam University, Republic of Korea) 

• Aug. 30, 2018 : The 7th Mini Section of The KPPY Combinatorics Seminars (Yeungnam University, Republic of Korea)

• Aug. 1 - 22, 2018 : The International Conference and PhD-Master Summer School on Graphs and Groups, Representations and Relations (Novosibirsk State University, Russia)

• Jul. 22 - Aug. 3, 2018 : Korean Early Career Researcher Workshop in Combinatorics 3 (KECRWIC 3) (Wonkwang University, Republic of Korea)

• Jun. 29 - 30, 2018 : 2018 KWMS The 14th International Conference (2018 한국여성수리과학회 국제학술대회) (KIAS, Republic of Korea)

• May 4, 2018 : 86th KPPY Combinatorics Workshop (Pusan National University, Republic of Korea)

• Feb. 19 - 23, 2018 : Workshop in Deformation Theory III (Universita Degli Studi di Bari Aldo Moro, Italy)

• Jan. 21 - Feb. 3, 2018 : Korean Early Career Researcher Workshop in Combinatorics 2 (KECRWIC 2) (Pusan National University, Republic of Korea)

• Dec. 18 - 21, 2017 : The 18th KIAS Combinatorics Workshop (Novotel Ambassaor Busan, Republic of Korea)

• Dec. 15, 2017 : 85th KPPY Combinatorics Workshop (Yeungnam University, Republic of Korea)

• Dec. 14, 2017 : The 6th Mini Section of the KPPY Combinatorics Seminar (Yeungnam University, Republic of Korea)

• Dec. 7 - 9, 2017 : 2017 PNU MATH FORUM (Pusan National University, Republic of Korea)

• Sep. 16, 2017 : 84th KPPY Combinatorics Workshop (Kyungpook National University, Republic of Korea)

• Jun. 22 - 23, 2017 : 2017 the 13th KWMS International Conference (2017 한국여성수리과학회 국제학술대회) (POSTECH, Republic of Korea) 

• May 31, 2017 : Junior Math Colloquium (Pusan National University, Republic of Korea) 

• May 27, 2017 : 83rd KPPY Combinatorics Workshop (Pusan National University, Republic of Korea)

• Apr. 28 - 30, 2017 : 2017 KMS Spring meeting (2017년도 대한수학회 봄 연구발표회) (Chosun University, Republic of Korea) 

• Apr. 22, 2017 : 82th KPPY Combinatorics Workshop (Yeungnam University, Republic of Korea)

• Apr. 21, 2017 : The 5th Mini Section of The KPPY Combinatorics Seminars (Yeungnam University, Republic of Korea)

• Feb. 21, 2017 : 81st KPPY Combinatorics Workshop (Pusan National University, Republic of Korea) 

• Feb. 9 - 11, 2017 : 15th Japan-Korea Workshop on Algebra and Combinatorics (JK 2017) (Kumamoto University, Japan)

• Dec. 19 - 21, 2016 : The 14th KIAS Combinatorics Workshop (Novotel Ambassaor Busan, Republic of Korea)

• Dec. 17, 2016 : 80th KPPY Combinatorics Workshop (Yeungnam University, Republic of Korea)

• Dec. 16, 2018 : The 4th Mini Section of The KPPY Combinatorics Seminars (Yeungnam University, Republic of Korea)

• Dec. 1 - 3, 2016 : PNU MATH FORUM 2016 (Pusan National University, Republic of Korea) 

• Oct. 8, 2016 : 79th KPPY Combinatorics Workshop (Kyungpook National University, Republic of Korea)

• Aug. 2, 2016 : 78th KPPY Combinatorics Workshop (Pusan National University, Republic of Korea)

• Jul. 25 - 29, 2016 : The Asian Mathematical Conference 2016 (Bali Nusa Dua Convention Center, Bali, Indonesia)

• Jul. 21, 2016 : The 82nd Open Seminar on Algebras, Combinatorics and Algorithms (OSACA) (Pusan National University, Republic of Korea) 

• Jun. 24 - 25, 2016 : Yeungnam Mathematical Society (2016 영남수학회 정기총회 및 학술발표회) (Keimyung University, Republic of Korea)

• Jun. 21, 2016 : 77th KPPY Combinatorics Workshop (Kyungpook Nationa University, Republic of Korea)

• Apr. 22 - 24, 2016 : 2016 KMS Spring meeting (2016년도 대한수학회 봄 연구발표회) (Sung Kyun Kwan University, Republic of Korea)

• Apr. 1 - 2, 2016 : 2016 The Korean Society of Mathematical Education (2016 춘계학술대회 및 정기총회) (Pusan National University, Republic of Korea)

• Feb. 24, 2016 : Junior Math Colloquium (Pusan National University, Republic of Korea)

• Sep. 5, 2015 : 72nd KPPY Combinatorics Seminar (Pusan National University, Republic of Korea)

• Jul. 26 - 30, 2015 : The 7th KOOK-TAPU Joint Seminar on Knots and Related Topics & The 9th Graduate Student Workshop on Mathematics (Osaka City University, Osaka, Japan)

• Jul. 15 - 17, 2015 : PNU MATH FORUM 2015 (Pusan National University, Republic of Korea) 

• Jun. 26 - 27, 2015 : 2015 Yeungnam Mathematical Society (2015 영남수학회 정기총회 및 연구발표회) (Pusan National University, Republic of Korea)

• Jun. 11 - 12, 2015 : 2015 International Workshop on Nonlinear PDE and Applications (Pusan National University, Republic of Korea)

• May 28, 2015 : The 53rd Open Seminar on Algebras, Combinatorics and Algorithms (OSACA) (Pusan National University, Republic of Korea)