Theorem: A Static Magnetic N-pole Becomes an Oscillating Electric N-pole
  in a Cosmic Axion Field
  We show for the classical Maxwell equations, including the axion
electromagnetic anomaly source term, that a cosmic axion field induces an
oscillating electric N-moment for any static magnetic N-moment. This is a
straightforward result, accessible to anyone who has taken a first year
graduate course in electrodynamics.
