Python Module Index a | s a ampform ampform.dynamics ampform.dynamics.builder ampform.dynamics.kmatrix ampform.dynamics.phasespace ampform.helicity ampform.helicity.decay ampform.helicity.naming ampform.io ampform.kinematics ampform.kinematics.angles ampform.kinematics.lorentz ampform.kinematics.phasespace ampform.sympy ampform.sympy.deprecated ampform.sympy.math s symplot