is intended to represent the filling factor interval $0.85 \le \nu \le 1.15$, over which fractional quantum Hall effects are not normally observed and it appears likely that Hartree-Fock approximation calculations are able to represent interaction effects. Some of our findings may help explain the striking tilted plateau feature observed in the NMR spectra [@Barrett_private] near $\nu=1$. Nevertheless, we have found rich structure in the crossover between non-interacting and disorder-free limits of the $\nu=1$ quantum Hall effect which helps explain the difficulty experienced in attempting to construct a simple interpretation of low-temperature NMR spectra. Our calculations motivate experimental studies of $\nu=1$ transport activation energy studies near the paramagnetic to ferromagnetic phase transition.

Helpful conversations with S.E. Barrett, Luis Brey, and Tatsuya Nakajima are greatly acknowledged. This work was supported by the National Science Foundation under grants DMR-9714055 and DMR-9820816.

For an introduction to Skyrmions and related topics see S.M. Girvin, [*The Quantum Hall Effect: Novel Excitations and Broken Symmetries*]{} in Les Houches Summer School 1998 (to be published by Springer Verleg and Les Editions de Physique, 1999), and references therein. S.M. Girvin and A.H. MacDonald, in [*Perspectives in Quantum Hall Effects: Novel Quantum Liquids in Low-Dimensional Semiconductor Structures*]{}, edited by 