Xumei Xi

Researcher, Pinterest, Inc.

Joined

September 2022

Names

Xumei Xi (Preferred)

Emails

****@cornell.edu (Confirmed)

****@gmail.com (Confirmed)

****@pinterest.com (Confirmed)

Personal Links

Career & Education History

Researcher

Pinterest, Inc. (pinterest.com)

2024 – Present

PhD student

Cornell University (cornell.edu)

2019 – 2024

Advisors, Relations & Conflicts

PhD Advisor

Christina Lee Yu

2021 – 2024

PhD Advisor

Yudong Chen

2020 – 2024

Expertise

Recommender systems

2022 – Present

Reinforcement Learning

2021 – Present

Statistics

2020 – Present

Publications

Local Minima Structures in Gaussian Mixture Models
Yudong Chen, Dogyoon Song, Xumei Xi, Yuqian Zhang
- IEEE Trans. Inf. Theory 2024
- Readers: Everyone
Entry-Specific Matrix Estimation under Arbitrary Sampling Patterns through the Lens of Network Flows
Yudong Chen, Xumei Xi, Christina Lee Yu
- CoRR 2024
- Readers: Everyone
Integrating Offline Reinforcement Learning with Transformers for Sequential Recommendation
Xumei Xi, Yuke Zhao, Quan Liu, Liwen Ouyang, Yang Wu
- RecSys 2023
- Readers: Everyone
Matrix Estimation for Offline Reinforcement Learning with Low-Rank Structure
Xumei Xi, Christina Lee Yu, Yudong Chen
- CoRR 2023
- Readers: Everyone
Entry-Specific Bounds for Low-Rank Matrix Completion under Highly Non-Uniform Sampling
Xumei Xi, Christina Lee Yu, Yudong Chen
- ISIT 2023
- Readers: Everyone
Matrix Estimation for Offline Evaluation in Reinforcement Learning with Low-Rank Structure
Xumei Xi, Christina Yu, Yudong Chen
- 05 Oct 2022 (modified: 05 May 2023)
- Offline RL Workshop NeurIPS 2022
- Readers: Everyone
Tensor Completion with Nearly Linear Samples Given Weak Side Information
Christina Lee Yu, Xumei Xi
- Published: 01 Jan 2022, Last Modified: 17 May 2023
- Proc. ACM Meas. Anal. Comput. Syst. 2022
- Readers: Everyone

Xumei Xi

Names

Emails

Personal Links

Career & Education History

Advisors, Relations & Conflicts

Expertise

Publications

Local Minima Structures in Gaussian Mixture Models

Entry-Specific Matrix Estimation under Arbitrary Sampling Patterns through the Lens of Network Flows

Integrating Offline Reinforcement Learning with Transformers for Sequential Recommendation

Matrix Estimation for Offline Reinforcement Learning with Low-Rank Structure

Entry-Specific Bounds for Low-Rank Matrix Completion under Highly Non-Uniform Sampling

Matrix Estimation for Offline Evaluation in Reinforcement Learning with Low-Rank Structure

Tensor Completion with Nearly Linear Samples Given Weak Side Information

Co-Authors