Zero-dilation indices and numerical ranges, International Congress of Mathematicians, Pennsylvania Convention Center, July 23-30, 2026.
A Family of Completely PPT Maps, 2026 Workshop on Matrices and Operators, Shiv Nadar Institution of Eminence (Deemed to be University), June 25-28, 2026.
Zero-dilation indices and numerical ranges, Mathematical Society of the Philippines (MSP) Convention, The Golden Lion Hotel, June 3-5, 2026.
On the k-numerical ranges of matrices, International Linear Algebra Society (ILAS) 2026 Meeting, Virginia Tech, Blacksburg, Virginia, May 18-22, 2026.
Zero-dilation indices and numerical ranges, International Linear Algebra Society (ILAS) 2025 Meeting, National Sun Yat-sen University, Kaohsiung, Taiwan, June 23-27, 2025.
Zero-dilation indices and numerical ranges, Workshop on Numerical Ranges and Numerical Radii (WONRA) 2025, National Chung Hsing University, Taichung, Taiwan, June 19-21, 2025.
A Family of Completely PPT Maps, Mathematical Society of the Philippines (MSP) Convention, Palacio Del Sur, Zamboanga City, May 29-31, 2025.
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.