Copy full text Document: arxe_kd_critical_exponents_v1 Version: 1.0 (extracted 2026-08-03 from a larger internal working document) Status: Complete derivation — η NAT formula formally derived for three cases; open gaps documented Relation to corpus: Extension of the lanthanide Kramers-doublet note (n−4 formula) and of the corpus’s 3D critical-exponent tables (Ising, O(2), Percolation) Date: June 2026 Derivation assisted by Claude.ai (Anthropic) Editorial…