Tyler Chen
I am an Assistant Professor / Courant Instructor at New York University, with a joint appoinment with Mathematics at Courant and Computer Science and Engineering at Tandon.
I work most closely with Chris Musco.
I got my PhD in Applied Math from the University of Washington, where I was advised by Anne Greenbaum and Tom Trogdon.
Before that, I studied math, physics, and studio art at Tufts University.
Broadly, my research aims design and analyze fast (in theory and practice) algorithms for core linear algebra tasks.
An overview of my research interests along with more detailed introductions to particular directions can be found here as well as by following the links on papers listed below.
I’m always interested in finding things to collaborate on (and people to collaborate with).
I am committed to making my research accessible and to facilitating the reproducibility/replicability of my work.
Code to generate the figures from my papers can be found on Github.
Please feel free to contact me with any questions about my research.
I am happy with “they” or “he” as pronouns.
Key Info
Student mentorship
I believe strongly in the value of undergraduate research and student mentorship, and am currently working with a several of undergraduate students on research projects.
Previous projects with undergrads have resulted in publications.
I am particularly committed to supporting students from groups underrepresented in math and students receiving federal work study or other need-based financial aid.
If you’re an undergrad student interested in research or grad school, please feel free to reach out; I’m always happy to answer quetions.
Talks
Slides for my talks and a list of upcoming travel can be found here.
Papers (in progress)
[6]
Randomized block Krylov subspace methods for low rank approximation of matrix functions
David Persson, Tyler Chen, and Christopher Musco.
2024
.
[5]
Near-optimal hierarchical matrix approximation from matrix-vector products
Tyler Chen, Feyza Duman Keles, Diana Halikias, Cameron Musco, Christopher Musco, and David Persson.
2024
.
[4]
Fixed-sparsity matrix approximation from matrix-vector products
Noah Amsel, Tyler Chen, Feyza Duman Keles, Diana Halikias, Cameron Musco, and Christopher Musco.
2024
.
[3]
Optimal Polynomial Approximation to Rational Matrix Functions Using the Arnoldi Algorithm
Tyler Chen, Anne Greenbaum, and Natalie Wellen.
2023
.
[2]
Near-Optimality Guarantees for Approximating Rational Matrix Functions by the Lanczos Method
Noah Amsel, Tyler Chen, Anne Greenbaum, Cameron Musco, and Christopher Musco.
2023
.
[1]
Randomized matrix-free quadrature for spectrum and spectral sum approximation
Tyler Chen, Thomas Trogdon, and Shashanka Ubaru.
2022
.
Papers (published)
[15]
Faster randomized partial trace estimation
Tyler Chen, Robert Chen, Kevin Li, Skai Nzeuton, Yilu Pan, and Yixin Wang.
SIAM Journal on Scientific Computing.
2023
.
To appear
[14]
Near-optimal convergence of the full orthogonalization method
Tyler Chen and Gérard Meurant.
Electronic Transactions on Numerical Analysis.
2024
.
To appear
[13]
On the fast convergence of minibatch heavy ball momentum
Raghu Bollapragada, Tyler Chen, and Rachel Ward.
IMA Journal of Numerical Analysis.
2024
.
To appear
[12]
GMRES, pseudospectra, and Crouzeix’s conjecture for shifted and scaled Ginibre matrices
Chen, Tyler, Greenbaum, Anne, and Trogdon, Thomas.
Mathematics of Computation.
2024
.
[11]
A posteriori error bounds for the block-Lanczos method for matrix function approximation
Qichen Xu and Tyler Chen.
Numerical Algorithms.
2024
.
[10]
Stability of the Lanczos algorithm on matrices with regular spectral distributions
Chen, Tyler and Trogdon, Thomas.
Linear Algebra and its Applications.
2024
.
[9]
A spectrum adaptive kernel polynomial method
Tyler Chen.
The Journal of Chemical Physics.
2023
.
[8]
Krylov-Aware Stochastic Trace Estimation
Tyler Chen and Eric Hallman.
SIAM Journal on Matrix Analysis and Applications.
2023
.
[7]
Low-Memory Krylov Subspace Methods for Optimal Rational Matrix Function Approximation
Tyler Chen, Anne Greenbaum, Cameron Musco, and Christopher Musco.
SIAM Journal on Matrix Analysis and Applications.
2023
.
[6]
Numerical computation of the equilibrium-reduced density matrix for strongly coupled open quantum systems
Tyler Chen and Yu-Chen Cheng.
The Journal of Chemical Physics.
2022
.
[5]
Error Bounds for Lanczos-Based Matrix Function Approximation
Tyler Chen, Anne Greenbaum, Cameron Musco, and Christopher Musco.
SIAM Journal on Matrix Analysis and Applications.
2022
.
[4]
Analysis of stochastic Lanczos quadrature for spectrum approximation
Tyler Chen, Thomas Trogdon, and Shashanka Ubaru.
Proceedings of the 38th International Conference on Machine Learning.
2021
.
[3]
On the Convergence Rate of Variants of the Conjugate Gradient Algorithm in Finite Precision Arithmetic
Anne Greenbaum, Hexuan Liu, and Tyler Chen.
SIAM Journal on Scientific Computing.
2021
.
[2]
Non-asymptotic moment bounds for random variables rounded to non-uniformly spaced sets
Tyler Chen.
Stat.
2021
.
[1]
Predict-and-recompute conjugate gradient variants
Tyler Chen and Erin C. Carson.
SIAM Journal on Scientific Computing.
2020
.
Thesis
Lanczos based methods for matrix functions
[PDF]
[source]
[commentary on design]
Here are links to my Google Scholar profile and ORCID: 0000-0002-1187-1026.
Other
Materials from my past applications and proposals can be found here.