  We report on analytic and numerical studies of spin textures in quantum Hall
systems using a long-wavelength effective action for the magnetic degrees of
freedom derived previously. The majority of our results concern skyrmions or
solitons of this action. We have constructed approximate analytic solutions for
skyrmions of arbitrary topological and electric charge and derived expressions
for their energies and charge and spin radii. We describe a combined
shooting/relaxational technique for numerical determination of the skyrmion
profiles and present results that compare favorably with the analytic treatment
as well as with Hartree-Fock studies of these objects. In addition, we describe
a treatment of textures at the edges of quantum Hall systems within this
approach and provide details not reported previously.
