Even Theta Symmetry Pairs Newman Collisions and Reduces the Four-Edge Holonomy to One Three-Edge Cell
Evenness makes the spatial Prüfer component even and its heat component odd. Moreover,
so the central edge is phase-fixed and collision-free.
Every collision at positive height is mirrored at negative height. Their combined degree is , and backward heat emits one full off-seam quartet. The complete rectangle is therefore two reflected copies of one three-port half-cell—physical edge, de Bruijn edge, and positive infinity wall—glued along the inert central source port.
Finite collision freedom reduces to vanishing of the three-edge half-holonomy. The positive infinity wall remains indispensable.
Research packet:
research/grothendieck/even-theta-symmetry-pairs-newman-collisions-and-reduces-the-four-edge-holonomy-to-one-three-edge-cell.md
Checker:
research/grothendieck/checkers/check_even_newman_collision_pairing_and_half_domain.py
The dependency-free checker passes 15/15 gates.