2 papers
math.CO2026
Total positivity of transformation matrices for uniform subdivisions
Yanxin Liu, Jianxi Mao
The transformation of the -vector of a finite simplicial complex under an -uniform subdivision is encoded by a transformation matrix. Mu and Welker conjectured that…
physics.optics2026
Exceptional-point-constrained locking of boundary-sensitive topological transitions in chiral non-Hermitian SSH-type lattices
Huimin Wang, Yanxin Liu, Zhijian Li +1
Topological transitions in non-Hermitian systems are generally boundary sensitive: a point-gap winding transition under periodic boundary condition (PBC) and a non-Bloch bulk real-…