r=1 iff target then control. Zero relays = total fault isolation. No error correction needed for this class of errors. Topology provides the protection.
Twenty-Four Theorems · Non-transitivity · General fidelity · CZ duality · Fault isolation · Container · Builder memory · N-relay · Transfer matrix · Projector · Disorder decay · CZ polynomial · Universal linearity · General formula · Universal 4×4 transfer matrix