Nanyang Associate Professor Division of Mathematical Sciences School of Physical and Mathematical Sciences (SPMS) Nanyang Technological University (NTU) Singapore E-mail: hemant (dot) tyagi (at) ntu (dot) edu (dot) sg Office: SPMS-MAS-05-44

Links
[Bio] [Publications] [Supervision] [Teaching] [Organization] [Talks]

Job openings
Multiple PhD and postdoc positions available in 2025, see here for details. Before emailing me, please read the job-description carefully.
PhD application for Jan 2026 intake: applications will be considered till 30th September 2025

Research interests
High-dimensional statistics, Optimization, Statistical learning theory, Inverse problems on graphs, Learning dynamical processes

Summary of research
Broadly speaking, I am interested in inverse problems where we are given noisy and limited information about a signal of interest, and the goal is to estimate (or "learn") the unknown signal. I am particularly interested in the setting where the signal is high-dimensional, but has some intrinsic low-dimensional structure. So far, I have worked on the following problems.

- Learning high dimensional functions from point queries
- Multi-armed bandit problems
- Super-resolution of point sources
- Phase unwrapping
- Inverse problems on graphs (community detection, ranking from pairwise comparisons, group synchronization, graph matching)
- Learning dynamical systems