V.T233 — Filament Magnetic Field Theorem

B_fil ~ Φ_pol/A_fil ~ 10–100 nG from SMBH B ~ 1 G at R_S diluted over (2 Mpc)² cross-section. Topological protection prevents isotropic dispersal. 1–2 OOM stronger than random dynamo (0.1–1 nG).