Bs. Yan, REMARKS ON W-1,W-P-STABILITY OF THE CONFORMAL SET IN HIGHER DIMENSIONS, Annales de l Institut Henri Poincare. Analyse non lineaire, 13(6), 1996, pp. 691-705
In this paper, we study the stability of maps in W-1,W-p that are clos
e to the conformal set K-1 = R(+). SO(n) in an averaged sense as descr
ibed in Definition 1.1. We prove that K-1 is W-1,W-p-compact for all p
greater than or equal to n but is not W-1,W-p-stable for any 1 less t
han or equal to p < n/2 when n greater than or equal to 3. We also pro
ve a coercivity estimate for the integral functional integral(Rn) d(K1
)(p)(del phi(x)) dx on W-1,W-p(R(n);R(n)) for certain values of p lowe
r than n using some new estimates for weak solutions of p-harmonic equ
ations.