Physlib.QFT.QED.AnomalyCancellation.LowDim.Two

For a pure $U(1)$ gauge theory with $n=2$ fermions, this is the equivalence between the space of linear solutions and the space of full solutions. Specifically, it maps a solution of the linear gravitational anomaly condition, $x_1 + x_2 = 0$, to a solution of the full system of Anomaly Cancellation Conditions (ACCs), which includes both the linear condition and the cubic gauge anomaly condition $x_1^3 + x_2^3 = 0$. This equivalence is based on the mathematical fact that for any $x_1, x_2 \in \mathbb{Q}$, the linear constraint $x_1 + x_2 = 0$ implies the cubic constraint $x_1^3 + x_2^3 = 0$.