A Nitsche-based domain decomposition method for hypersingular integral   equations
  We introduce and analyze a Nitsche-based domain decomposition method for the solution of hypersingular integral equations. This method allows for discretizations with non-matching grids without the necessity of a Lagrangian multiplier, as opposed to the traditional mortar method. We prove its almost quasi-optimal convergence and underline the theory by a numerical experiment. 
Franz Chouly, Norbert Heuer
math.NA