Publications (14)
MARVEL Analysis of the Measured High-resolution Spectra of CO Isotopologues
Timur Grigorev, Yuhang Dai, Max Potter +3
Carbon monoxide is thought to be the second most abundant molecule in the Universe. This makes observation of both its parent isotopologue (CO) and its stable isotopo…
Time-inconsistent mean field and n-agent games under relative performance criteria
Zongxia Liang, Keyu Zhang
In this paper we study a time-inconsistent portfolio optimization problem for competitive agents with CARA utilities and non-exponential discounting. The utility of each agent depe…
On time-inconsistent extended mean-field control problems with common noise
Zongxia Liang, Xiang Yu, Keyu Zhang
This paper studies a class of time-inconsistent mean field control (MFC) problems in the presence of common noise under non-exponential discount and joint law dependence of both st…
Stemma: Induced Decision Regions Reveal LLM Provenance
Keyu Zhang, Vadim Safronov, Andrew Martin
The paper introduces induced decision regions to abstract LLM outputs and proposes Stemma, a black‑box fingerprinting method that reliably detects whether a suspect model shares li…
Scalable Dexterous Robot Learning with AR-based Remote Human-Robot Interactions
Yicheng Yang, Ruijiao Li, Lifeng Wang +7
This paper focuses on the scalable robot learning for manipulation in the dexterous robot arm-hand systems, where the remote human-robot interactions via augmented reality (AR) are…
Equilibrium for Time-inconsistent Mean Field Games: A Systematic Analysis by Entropy Regularization
Erhan Bayraktar, Zhenhua Wang, Xiang Yu +1
This paper studies the existence and approximation of equilibria for general time-inconsistent mean field game (MFG) problems in continuous time. To handle the intricate nonlocal e…
Mean Field Game with Reflected Jump Diffusion Dynamics: A Linear Programming Approach
Zongxia Liang, Xiang Yu, Keyu Zhang
This paper develops a linear programming approach for mean field games with reflected jump-diffusion dynamics. We first prove the equivalence between the mean field equilibria in t…
RaceTEE: Enabling Interoperability of Confidential Smart Contracts
Keyu Zhang, Andrew Martin
Decentralized smart contracts enable trustless collaboration but suffer from limited privacy and scalability, which hinders broader adoption. Trusted Execution Environment (TEE) ba…
Policy Iteration Achieves Regularized Equilibrium under Time Inconsistency
Yu-Jui Huang, Xiang Yu, Keyu Zhang
For a general entropy-regularized time-inconsistent stochastic control problem, we propose a policy iteration algorithm (PIA) and establish its convergence to an equilibrium policy…
Equilibrium stochastic control with implicitly defined objective functions
Zongxia Liang, Jianming Xia, Keyu Zhang
This paper considers a class of stochastic control problems with implicitly defined objective functions, which are the sources of time-inconsistency. We study the closed-loop equil…
Major-Minor Mean Field Game of Stopping: An Entropy Regularization Approach
Xiang Yu, Jiacheng Zhang, Keyu Zhang +1
This paper studies a discrete-time major-minor mean field game of stopping where the major player can choose either an optimal control or stopping time. We look for the relaxed equ…
Constrained portfolio game with heterogeneous agents
Zongxia Liang, Keyu Zhang, Yaqi Zhuang
We investigate stochastic utility maximization games under relative performance concerns in both finite-agent and infinite-agent (graphon) settings. An incomplete market model is c…
Tailored Prompts, Targeted Protection: Vulnerability-Specific LLM Analysis for Smart Contracts
Xing Zhang, Keyu Zhang, Taohong Zhu +1
Smart contracts on blockchains are prone to diverse security vulnerabilities that can lead to significant financial losses due to their immutable nature. Existing detection approac…
A Mean Field Game Approach to Relative Investment-Consumption Games with Habit Formation
Zongxia Liang, Keyu Zhang
This paper studies an optimal investment-consumption problem for competitive agents with exponential or power utilities and a common finite time horizon. Each agent regards the ave…