Manuscript En03-A@1 · En03-A.tex · proposition · 5398614e
Proposition: Gauge invariance of marked-slice data
External conical geometry and certified local moves › Deficit and particle–slice data · lines 1349–1360 · proof included or linked
En03-A@1#prop:slice-invariance
The oriented deficit and are invariant under proper, time-orientation-preserving chart changes. Rapidity is an invariant of the particle together with the marked slice piece, not of the particle alone.
Proof. A chart change simultaneously conjugates and transforms , preserving the orientations and inner products.