Seminar

On-going

Organizer (contact me for more details): Matrix Analysis and Linear Algebra Group Seminar, Institute of Mathematics, University of the Philippines Diliman
- As Speaker:
  - A Family of Completely PPT Maps (Hybrid) Sep. 11, 2024
  - Introduction to NC Realizations (Hybrid) Dec. 4, 2023 (Part 1) and Dec. 18, 2023 (Part 2).
  - Zero-dilation index of block companion matrices (Hybrid) Apr. 17, 2023.
Participant: Matrix Seminar, Department of Mathematics and Statistics, University of Nevada, Reno
- Organizers: Mehmet Gumus, Yangyang He, Pan-Shun Lau, Tin-Yau Tam, Xiang Xiang Wang
- As Speaker:
  - On commutators of unipotent matrices of index 2 (Online) Mar. 14, 2025.
  - Completing an Operator Matrix and the Free Joint Numerical Radius (Online) Dec. 3, 2021.

Conferences

Head of Organizing Committee

International Workshop on Matrix Analysis, Linear Algebra, and Applications (MALAA2025), University of the Philippines Diliman, July 1-2, 2025.

Oral Presentation

Zero-dilation indices and numerical ranges, ILAS Special Session on Generalized Numerical Ranges and Related Topics, Joint Mathematics Meetings, San Francisco, USA, Jan. 3-6, 2024.
Zero-dilation index of block companion matrices, Mathematical Society of the Philippines (MSP) Convention, Ateneo de Manila University, June 1-4, 2023.
Completing an Operator Matrix and the Free Joint Numerical Radius, Second International Worshop on Matrix Theory and Applications (Online), Nov. 15-17, 2022.
Continuity of submatrices and Ritz sets associated to a point in the numerical range, Conference on Applied Linear Algebra (Online), May 17-21, 2021.
Location of Ritz values in the numerical range of normal matrices, AMS Special Session on Eigenvalues, Nonnegative Matrices and Applications, Virtual Joint Mathematics Meetings, Jan. 6-9, 2021.
Location of Ritz values in the numerical range of normal matrices, The Fiftheent Workshop on Numerical Ranges and Numerical Radii (WONRA) 2019, Toyo University, Kawagoe Campus, June 21-24, 2019.
Lecturer for two sessions, South East Asian Mathematical Society (SEAMS) School on Topics in Matrix Analysis and Applications, University of the Philipines Diliman, Quezon City, Philippines, June 29-July 6, 2016.
Jordan Canonical Form of an S-orthogonal matrix based on the properties of its Householder vectors, South East Asian Mathematical Society (SEAMS) School on Topics in Matrix Analysis and Applications, University of the Philipines Diliman, Quezon City, Philippines, June 29-July 6, 2016.
S-orthogonal matrices as products of symmetries, International Linear Algebra Society (ILAS) 2014, Sunkyunkwan University, Seoul, South Korea, Aug. 6-9, 2014.
Characterization of products of two S-Householder matrices, Mathematical Society of the Philippines (MSP) Convention, Sarabia Manor Hotel, Iloilo City, Philippines, May 26-27, 2014.
On products of S-Householder matrices, Mathematical Society of the Philippines (MSP) Convention, The Legend Hotel Palawan, Puerto Princesa City, Philippines, May 17-18, 2013.
The J-Householder matrices, Mathematical Society of the Philippines (MSP) Convention, De la Salle Lipa University, Lipa City, Philippines, May 18-19, 2012.

Poster Presentations

The Cartan-Dieudonné-Scherk theorems for complex S-orthogonal matrices, International Congress of Mathematicians (ICM) 2014, COEX, Seoul, South Korea, Aug. 13-21, 2014.
On products of S-Householder matrices, Asian Math Conference (AMC) 2013, Busan, South Korea, June 30-July 4, 2014.

Other Conferences

Participant: Future Science Leaders' Forum, Vivere Hotel, Muntinlupa, Philippines, Nov. 13-14, 2024.
Participant: 46th Annual Scientific Meeting (ASM), Fiesta Pavillion, The Manila Hotel, Manila, Philippines, July 10-11, 2024.
Participant: KAPEHAN by NAST PHL, The Luxent Hotel, Quezon City, July 4, 2024.
Participant: 10th Heidelberg Laureate Forum, Heidelberg, Germany, Sep. 23-29, 2023.

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