  We establish upper and lower bounds for the infimum of the energy in homotopy
classes of mappings from real projective spaces to Riemannian manifolds. We
also show, as a corollary of the work of White in [Wh86], that the infimum of
the energy in a homotopy class of mappings of real projective $n$-space is
determined by an associated class of mappings of the real projective plane.
