225 226/-! ## Part 5: Gauge Rank Correspondence -/ 227 228/-- The **gauge rank** of a layer: the number of independent generators. 229 230 For a Lie group of rank r: 231 - SU(n) has rank n - 1, acts on ℂⁿ (fundamental rep dimension n) 232 - U(1) has rank 1 233 234 The cube layers provide the FUNDAMENTAL REPRESENTATION DIMENSIONS: 235 - S₃ acts on 3 axes → fundamental rep dimension 3 → SU(3) 236 - (ℤ/2ℤ)² acts on 2-element subsets → fundamental rep dimension 2 → SU(2) 237 - ℤ/2ℤ acts on parity → fundamental rep dimension 1 → U(1) -/
depends on (13)
Lean names referenced from this declaration's body.