3 papers
cond-mat.str-el2026
Higher-Dimensional Anyons via Higher Cohomotopy
Sadok Kallel, Hisham Sati, Urs Schreiber
We highlight that integer Heisenberg groups at level 2 underlie topological quantum phenomena: their group algebras coincide with the algebras of quantum observables of abelian any…
math-ph2025
Configuration Spaces of Points: A User's Guide
Sadok Kallel
This user's guide (updated version) consists of two parts. The first part is an extensive survey contributed to the Encyclopedia of Mathematical Physics, 2nd edition. It covers man…
math.DS2025
Constrained polynomial roots and a modulated approach to Schur stability
Ziyad AlSharawi, Jose S. Cánovas, Sadok Kallel
It is common in stability analysis to linearize a system and investigate the spectrum of the Jacobian matrix. This approach faces the challenge of determining the matrix spectrum w…