Xujin Chen

collaborators

3 papers

math.OC2026

Online Trading as a Secretary Problem Variant

Xujin Chen, Xiaodong Hu, Changjun Wang +2

This paper studies an online trading variant of the classical secretary problem, called secretary problem variant trading (SPVT), from the perspective of an intermediary who facili…

math.OC2025

Supermodular Maximization with Cardinality Constraints

Xujin Chen, Xiaodong Hu, Changjun Wang +1

Let $V$ be a finite set of $n$ elements, $f : 2^{V} \to R_{+}$ be a nonnegative monotone supermodular function, and $k$ be a positive integer no greater than $n$ . This…

cs.GT2025

When does additional information lead to longer travel time in multi-origin-destination networks?

Xujin Chen, Xiaodong Hu, Xinqi Jing +1

The Informational Braess' Paradox (IBP) illustrates a counterintuitive scenario where revelation of additional roadway segments to some self-interested travelers leads to increased…