Alex Wein

Alex Wein

Contact Information

MIT, Room 2-390D
Department of Mathematics
Cambridge, MA 02139
USA


Note: I have moved to NYU Courant. My new website is here.

About Me

I recently completed a Ph.D at the MIT Mathematics Department, advised by Ankur Moitra. Starting in Fall 2018, I am excited to be joining the NYU Courant Institute and the Simons Collaboration on Algorithms & Geometry as a postdoc.

My research interests include the statistical and computational limits of inference problems arising in data science, machine learning, and optimization. I am also interested in connections to statistical physics, representation theory, algebraic geometry, and invariant theory.

CV (updated 3/19/2018)


Papers

Estimation under group actions: recovering orbits from invariants
Afonso S. Bandeira, Ben Blum-Smith, Joe Kileel, Amelia Perry, Jonathan Weed, Alexander S. Wein
[arXiv] [slides]

Statistical limits of spiked tensor models
Amelia Perry, Alexander S. Wein, Afonso S. Bandeira
[arXiv]

Message-passing algorithms for synchronization problems over compact groups
Amelia Perry, Alexander S. Wein, Afonso S. Bandeira, Ankur Moitra
To appear in CPAM
[arXiv] [slides]

Optimality and Sub-optimality of PCA for Spiked Random Matrices and Synchronization
Amelia Perry, Alexander S. Wein, Afonso S. Bandeira, Ankur Moitra
[arXiv] [slides]
Split into 2 parts for publication:
Part I: spiked random matrices (to appear in the Annals of Statistics) [arXiv]
Part II: synchronization (in preparation)

How Robust are Reconstruction Thresholds for Community Detection?
Ankur Moitra, William (Amelia) Perry, Alexander S. Wein
In STOC 2016
[arXiv] [slides]

A semidefinite program for unbalanced multisection in the stochastic block model
Amelia Perry, Alexander S. Wein
In SampTA 2017
[arXiv]


Other

Statistical Estimation in the Presence of Group Actions
Ph.D thesis, Massachusetts Institute of Technology, 2018
[PDF] [slides]

Notes on computational-to-statistical gaps: predictions using statistical physics
Afonso S. Bandeira, Amelia Perry, Alexander S. Wein
To appear in Portugaliae Mathematica
[arXiv]