2 papers
math.GR2026
A note on the scatteredness of reflection orders
Weijia Wang, Rui Wang
In this note, we characterize affine and non-affine Coxeter systems among all Coxeter systems in terms of the structure of their reflection orders. For an infinite irreducible syst…
cond-mat.mes-hall2026
Anomalous Collision of Exceptional Points on Nonorientable Manifolds
Weijia Wang, Qicheng Zhang, Kun Zhang +2
Band degeneracies, ranging from Hermitian Dirac points to non-Hermitian exceptional points (EPs), play a central role in topological phase transitions. Beyond the topology of indiv…