● The 05C50 Online, University of Manitoba, April 5, 2024 (through Zoom).
● The 2023 CMS Winter Meeting, Montreal, Canada, December 1--4, 2023.
● Canadian Discrete and Algorithmic Mathematics (CanaDAM 2023), Winnipeg, Canada, June 5--8, 2023.
● The Western Canada Linear Algebra Meeting (WCLAM), University of Regina, Regina, Canada, May 27-28, 2023.
● A seminar at the UM Combinatorics Seminar, University of Manitoba, Winnipeg, Canada, Feb. 16, 2023 (through Zoom). ● A seminar at the Discrete Mathematics Research Group, University of Regina, Regina, Canada, Feb. 1, 2023.
● 2022 CMS Winter Meeting, Chelsea Hotel in Toronto, Ontario, December 2--5, 2022.
● Prairie Discrete Math Workshop, June 9--10, 2022 (through Zoom).
● Western Canada Linear Algebra Meeting, May 29-30, 2021.
● The Canadian Discrete and Algorithmic Mathematics Conference (CanaDAM 2021), May 25-28, 2021.
● Departmental Colloquium, Department of Mathematics and Statistics, University of Regina, Regina, Canada, March 5, 2021. ● A seminar at the Department of Mathematics and Statistics of Dalhousie University, Halifax, Canada, January 26~28, 2020.
● A seminar in GERAD, Montreal, Canada, November 27, 2019.
● The 6th Workshop of AORC, Yangpyeong, Korea, June 26--28, 2019.
● ICMTA 2018, Shanghai University, Shanghai, China, December 17~20, 2018.
● KSIAM 2018, Jeju island, Korea, November 2--4, 2018.
● The 5th Workshop of AORC, Yangpyeong, Korea, July 2--4, 2018.
● 5th International Conference on Riordan Arrays and Related Topics (5RART 2018), Busan, Korea, June 25-29, 2018.
● 2017 Korea-China International Conference on Matrix Theory with Applications AORC-IRCTMT Joint Meeting Sungkyunkwan University, Suwon, Korea, December 14--17, 2017.
● The 4th Symposium on Riordan Arrays and Related Topics (4RART), Universidad Complutense de Madrid, Madrid, Spain, July 17~20, 2017.
● The 3rd Workshop of AORC, Yangpyeong, Korea, Jun. 22 --24, 2017.
● KKMS-CCMS Joint Conference and Annual Meeting, Dankook University, Cheonan, June 8--10, 2017.
● WORKING WORKSHOP on MATRIX/OPERATOR THEORY AND THEIR APPLICATIONS, Sungkyunkwan Uni., Suwon, May 22 - June 2, 2017.
● The Group one's Workshop of AORC, Sungkyunkwan Uni., Suwon, Korea, Jan. 16--20 , 2017.
● 2016 IRCTM-AORC Winter Conference on MATRIX THEORY AND RELATED TOPICS, Shanghai University, Shanghai, China, Dec. 28-31, 2016.
● The 2nd Workshop of AORC, Anmyeondo Island, Korea, Dec. 15--17, 2016. ● KSIAM 2016 Annual Meeting, Jeju, Korea, Nov. 11--13, 2016.