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Radial Modes

  We now complete the formalism needed to describe the temperature and polarization fields by adding a spatial dependence to the modes. By further separating the radial dependence of the modes, we gain insight on their full angular structure. This decomposition will be useful in constructing the formal integral solutions of the perturbation equations in §IIIC. We begin with its derivation and then proceed to its geometric interpretation.


Wayne Hu