chern-number
One tight-binding Hamiltonian, every observable: bands, DOS, optical and Hall conductivity, topology, NEGF transport, magnetic fields and sparse solvers - every physics claim pinned to a closed-form test
Build and solve tight-binding models in Python: band structures, band topology (Chern, Z2, higher-order), quantum transport, Floquet and moiré systems, in vectorized NumPy/SciPy, for teaching and research
