Sourced Memory under Corners: Axial–Rotor Unification and the Determinant Law of the Coupled Twistor Reduction

This paper extends the coupled torsionful twistor reduction to homogeneous rotating corners with general pure-axial torsion. It proves the exact generator normal form G=γI4+A⊕AG=γ I_4+A⊕ AG=γI4+A⊕A, showing that the time-axial component controls the frozen memory clock while spatial axial torsion only shifts the effective rotor. The sourced Duhamel memory is reduced to a determinant/resolvent law, giving resonance-free memory weights, corner imprint formulas, and a self-matching locus.