III.P32 — Bridge Algebraic Reduction

κ(C;3)²·(1−ι_τ)² = ι_τ⁶ exactly (algebraic identity). This reduces OQ.07 (confinement bridge) to OQ.09 (E₆ near-identity) by pure algebra: the (1−ι_τ)² factors cancel, leaving E₆·ι⁶ ≈ −1.