[Theory] 4/21 Talks at TTIC: Fred Zhang, UC Berkeley

[Mary Marre]

*When:*        Friday, April 21, 2023 at* 10:30 am** CT   *


*Where:       *Talk will be given *live, in-person* at

                   TTIC, 6045 S. Kenwood Avenue

                   5th Floor, Room 530


*Virtually:*  *via* Panopto (*livestream
<https://uchicago.hosted.panopto.com/Panopto/Pages/Viewer.aspx?id=3ceb090c-ce07-4945-9172-afe5013484c7>*
)


*Who:          *Fred Zhang, UC Berkeley
------------------------------
*Title:   *       Online Prediction in Sub-linear Space

*Abstract:* We design the first sub-linear memory algorithm for online
learning with expert advice, arguably the most basic question in online
and sequential decision making. This problem is solved classically by the
well-known multiplicative weights update method, which achieves optimal
regret but suffers a linear space complexity. We show how to bypass this
barrier. In this talk, I will discuss the main techniques, recent follow-up
works, and many open directions. Joint work with Binghui
Peng (https://arxiv.org/abs/2207.07974, SODA 23).

*Bio:* Fred Zhang is a fifth-year PhD student in the theory group at
Berkeley, advised by Jelani Nelson. He is broadly interested in algorithmic
questions in learning and statistics.

*Host: **Madhur Tulsiani* <madhurt at ttic.edu>



Mary C. Marre
Faculty Administrative Support
*Toyota Technological Institute*
*6045 S. Kenwood Avenue, Rm 517*
*Chicago, IL  60637*
*773-834-1757*
*mmarre at ttic.edu <mmarre at ttic.edu>*
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