Minimality and perturbation of singularities for certain p-harmonic maps Changyou Wang singularitiesP-harmonics problemsP-harmonic mapsminimizing maps Indiana University Mathematics Journal 1998 text pdf 10.1512/iumj.1998.47.1434 10.1512/iumj.1998.47.1434 en Indiana Univ. Math. J. 47 (1998) 725 - 740 state-of-the-art mathematics http://iumj.org/access/