Publications (95)
The maximum number of triangles in graphs without the square of a path
Yichen Wang, Ervin GyÅri
The generalized Turán number for of , denoted by $\ex(n,H,G)$, is the maximum number of copies of in an -vertex -free graph. When is an edge, $\ex(n,H,G)$ is…
Optimizing Diversity and Quality through Base-Aligned Model Collaboration
Yichen Wang, Chenghao Yang, Tenghao Huang +3
Alignment has greatly improved large language models (LLMs)' output quality at the cost of diversity, yielding highly similar outputs across generations, especially in open-ended g…
Can A Society of Generative Agents Simulate Human Behavior and Inform Public Health Policy? A Case Study on Vaccine Hesitancy
Abe Bohan Hou, Hongru Du, Yichen Wang +6
Can we simulate a sandbox society with generative agents to model human behavior, thereby reducing the over-reliance on real human trials for assessing public policies? In this wor…
Stumbling Blocks: Stress Testing the Robustness of Machine-Generated Text Detectors Under Attacks
Yichen Wang, Shangbin Feng, Abe Bohan Hou +5
The widespread use of large language models (LLMs) is increasing the demand for methods that detect machine-generated text to prevent misuse. The goal of our study is to stress tes…
Learning to Optimize via Wasserstein Deep Inverse Optimal Control
Yichen Wang, Le Song, Hongyuan Zha
We study the inverse optimal control problem in social sciences: we aim at learning a user's true cost function from the observed temporal behavior. In contrast to traditional phen…
Inversion diameter and treewidth
Yichen Wang, Haozhe Wang, Yuxuan Yang +1
In an oriented graph , the inversion of a subset of vertices is the operation that reverses the orientation of all arcs with both end-vertices in . The i…