3 papers
math.CO2026
Binary X-rays of doubly stochastic matrices
Bangzheng Li, Yuewei Liu, Yuan Yao
The X-ray of a permutation is a sequence of sums along each diagonal of the associated permutation matrix. They satisfy certain necessary constraints on distribution of the values,…
math.RA2025
Commutative Quantale and Localization
Bangzheng Li, Yichen Xiao
In this paper we introduce the localization construction for quantales. A quantale is a complete semilattice combined with a multiplication. We mimic the notion of filter in a latt…
math.RT2025
The Quiver Problem is NP Complete
Victor Kac, Bangzheng Li
We prove that the quiver problem is NP complete.