However, it satisfies the following re- lation using the lift u(Vv) of the gauge transformation matrices: u(w′

of w′ 01 is independently defined from u(w01) via (10)

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cond-mat.mes-hall · 2024-12-25 · conditional · novelty 6.0

A discrete, gauge-fixing-free formula computes the Z2 second Stiefel-Whitney class from Bloch states on a mesh, verified on tight-binding models.

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A Discrete Formulation of Second Stiefel-Whitney Class for Band Theory cond-mat.mes-hall · 2024-12-25 · conditional · none · ref 2
A discrete, gauge-fixing-free formula computes the Z2 second Stiefel-Whitney class from Bloch states on a mesh, verified on tight-binding models.