Partial Regularity for Harmonic Maps into Spheres at a Singular or Degenerate Free Boundary
Roger Moser, Roberts, James · arXiv (Cornell University) · 2020
We prove partial regularity of weakly stationary harmonic maps with (partially) free boundary data on manifolds where the domain metric may degenerate or become singular along the free boundary at the rate $d^α$ for the distance function $d$ from the boundary.