7-adic tensor construction extracted from the N=1267 record: a 7-point exact code in (Z/7)^2 tensored with the compact 6-point integer genus-one set {0,2,5,13,16,18}. A GL_2(Z/7) boundary orientation gives 42 points at q=517 (N=7q), four steps below the generic no-wrap threshold q≥521.
Yongxi (Aaron) Lin · 2026-08-10 07:39:16 UTC