Talks and slides

• 3 June 2026: A Cayley Retraction-Based Riemannian Extension of AdamW, SIAM Conference on Optimization (OP26), University of Edinburgh, Scotland, United Kingdom. Download slides.
• 28 January 2026: Area-Preserving Surface Parameterizations via Riemannian Optimization, Mathematics of Data-Driven Models, Gran Sasso Science Institute, L'Aquila, Italy. Download slides.
• 5 November 2025: Riemannian gradient descent for spherical area-preserving mapping, COMPiLE Reading Group, Gran Sasso Science Institute, L'Aquila, Italy. Download slides.
• 8 October 2025: Optimization algorithms on matrix manifolds and applications, NMDS Seminar, University of Edinburgh, Scotland, United Kingdom. Download slides.
• 23 June 2025: Riemannian gradient descent for spherical area-preserving mapping, The 26th Conference of the International Linear Algebra Society (ILAS2025), National Sun Yat-sen University, Kaohsiung, Taiwan.
• 18 June 2025: Computing geodesics on the Stiefel manifold, Sun Yat-sen University, Shenzhen Campus, Guangming District, Shenzhen, Guangdong, China. Download slides.
• 8 May 2025: Riemannian multigrid line search for low-rank problems, NCKU Mathematics Colloquium, National Cheng Kung University, Tainan, Taiwan. Download slides.
• 10 Apr 2025: Riemannian multigrid line search for low-rank problems, Politecnico di Torino, Turin, Italy. Download slides.
• 12 Dec 2024: Optimization on matrix manifolds and applications, NCU Mathematics Colloquium, National Central University, Zhongli, Taiwan. Download slides.
• 8 Dec 2024: The 33rd Annual Meeting on Differential Equations and Related Topics, National Yang Ming Chiao Tung University, Hsinchu, Taiwan.
• 9 Sep 2024: 2024 NCTS Postdoc Symposium, NCTS, Taipei, Taiwan. Download slides.
• 23 Mar 2024: Numerical simulations using low-rank approximation, 2024 Conference on Advanced Topics and Auto Tuning in High-Performance Scientific Computing, National Center for High-Performance Computing in Hsinchu Science Park, Hsinchu, Taiwan. Download slides.
• 29 Jan 2024: Schwarz methods for computing geodesics, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia. Download slides.
• 27 Nov 2023: Numerical simulations using low-rank approximation, CFD Seminar, National Taiwan University of Science and Technology, Taipei, Taiwan. Download slides.
• 2 Nov 2023: Numerical optimization on matrix manifolds, NCKU Mathematics Colloquium, National Cheng Kung University, Tainan, Taiwan. Download slides. Download animations (zip archive).
• 4 Sep 2023: Implicit low-rank Riemannian schemes for the time integration of stiff PDEs, 2023 NCTS Postdoc Symposium, NCTS, Taipei, Taiwan. Slides.
• 25 Aug 2023: An efficient preconditioner for the Riemannian trust-region method on the manifold of fixed-rank matrices, Waseda University, Tokyo, Japan. Slides.
• 13 Mar 2023: An efficient preconditioner for the Riemannian trust-region method on the manifold of fixed-rank matrices, NCTS Spring Day, NCTS, Taipei, Taiwan.
• 10 Nov 2022: Image segmentation on Riemannian manifolds, MeDA Seminar, Taipei, Taiwan. Notes on BFGS. Slides. Printer-friendly version. Watch video.
• 27 Oct 2022: Computing geodesics on the Stiefel manifold, MeDA Seminar, Taipei, Taiwan. Download slides. Watch video.
• 12 Oct 2022: Computing geodesics on the Stiefel manifold, Taipei Postdoc Seminar, Taipei, Taiwan. Download slides.
• 29 Aug 2022: Federated Learning on Riemannian Manifolds, National Taiwan University, Taipei, Taiwan. Download slides. Watch video.
• 29 Apr 2022: Numerical optimization on matrix manifolds, Academia Sinica, Taipei, Taiwan. Download slides. Download animations (zip archive).

Talks on pose estimation algorithms:

• EfficientHRNet and Lite-HRNet, June 2021.
• The OpenPose algorithm, May 2021.

Posters

• Connecting geodesics for the Stiefel manifold, Swiss Numerics Day, 2018.
• Multiple shooting for Stiefel geodesics, Matrix Equations and Tensor Techniques VII, 2017.
• Analysis and optimization of perfectly matched layers for the Boltzmann equation, Swiss Numerics Colloquium, 2016.
• Analysis and Optimization of Perfectly Matched Layers for the Boltzmann Equation, Poster on the master project at EPFL, 2015.

Workshops and conferences

• 19 - 24 Jul 2026: Geometric Methods in Optimization and Numerical Analysis, Mathematisches Forschungsinstitut Oberwolfach, Oberwolfach, Germany.
• 2 - 5 Jun 2026: SIAM Conference on Optimization (OP26), University of Edinburgh, Scotland, United Kingdom.
• 26 - 28 Jan 2026: Mathematics of Data-Driven Models (local organizer), Gran Sasso Science Institute, L'Aquila, Italy.
• 23 - 27 Jun 2025: The 26th Conference of the International Linear Algebra Society (ILAS2025), National Sun Yat-sen University, Kaohsiung, Taiwan.
• 14 - 15 Jan 2025: 2025 TMS Annual Meeting, National Central University, Zhongli, Taiwan.
• 7 - 8 Dec 2024: The 33rd Annual Meeting on Differential Equations and Related Topics, National Yang Ming Chiao Tung University, Hsinchu, Taiwan.
• 22 - 23 Mar 2024: 2024 Conference on Advanced Topics and Auto Tuning in High-Performance Scientific Computing, National Center for High-Performance Computing in Hsinchu Science Park, Hsinchu, Taiwan.
• 28 Jan - 1 Feb 2024: 28th International Conference on Domain Decomposition Methods (DD28), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia.
• 22 - 23 Jan 2024: 2024 TMS Annual Meeting, National Chengchi University, Taipei, Taiwan.
• 9 Dec 2023: NCTS-Kyoto Mathematics Symposium, NCTS, Taipei, Taiwan.
• 20 - 25 Aug 2023: 10th International Congress on Industrial and Applied Mathematics, Waseda University, Tokyo, Japan.
• 29 - 30 Jun 2023: 32nd South Taiwan Statistics Conference, National Dong Hwa University, Hualien, Taiwan.
• 20 - 21 May 2023: 11th TWSIAM Annual Meeting, National Taiwan Normal University, Taipei, Taiwan.
• 13 Mar 2023: NCTS Spring Day, National Center for Theoretical Sciences, National Taiwan University, Taipei, Taiwan.
• 5 - 8 Aug 2019: International Conference on Continuous Optimization 2019, TU Berlin, Germany.
• 14 - 15 May 2018: Structured Matrix Days 2018, ENS Lyon, France.
• 20 Apr 2018: Swiss Numerics Day, ETH Zürich, Switzerland.
• 29 - 31 Aug 2017: Stepping Stone Symposium on Theoretical and Numerical Analysis of PDEs, University of Geneva, Switzerland.
• 28 Apr 2017: Swiss Numerical Analysis Day, University of Basel, Switzerland.
• 13 - 14 Feb 2017: Matrix Equations and Tensor Techniques VII, University of Pisa, Italy.
• 22 Apr 2016: Swiss Numerics Colloquium, University of Fribourg, Switzerland.

Winter schools

• 12 - 17 Jan 2020: Low-rank Models 2020 (local organizer), Villars-sur-Ollon (VD), Switzerland.
• 3 - 7 Apr 2017: Winter School on Hierarchical Matrices, Christian-Albrechts-Universität zu Kiel, Germany.
• 6 - 13 Jan 2017: Tensor Decompositions and (Large-Scale) Applications, KU Leuven, Belgium.