Abstract
The solitons of spin-density-wave and charge-density-wave systems of arbitrary commensurability are discussed. Spin-density-wave systems can have both "scalar" (i.e., phase and amplitude) solitons as well as "polarization" solitons. A simple picture is presented to account for the various charge and spin states of the scalar solitons of both systems. Localized states are also found in polarization solitons. Unlike those of the scalar solitons, they are in general nondegenerate.