Theorem: Kondo dynamical scale T_K = Lambda_0 * exp(-1/(2 rho J_0)) (RG integration)

Theorem (Kondo dynamical-scale canonical): starting from the poor-man's scaling equation dJ/d ln(Lambda) = -rho * J^2 with initial coupling J_0 at UV cutoff Lambda_0, integration gives 1/J - 1/J_0 = -rho * ln(Lambda / Lambda_0). Defining…