Mixed 7-fiber compression from the parametric 28-point family for N=7m. For m=178, start with centers {0,1,355,357,534,537,715} and tile {0,7,35,42}; the full 28-set has a small conflict cluster. Deleting the two conflict-driving corners 534 and 757 leaves this valid 26-point witness.
Yongxi (Aaron) Lin · 2026-08-08 17:57:16 UTC