
 The Finite Element Method (Partial Differential Equation Toolbox) (Site not responding. Last check: 20071010) 
  Then it is more economical to refine the mesh selectively, i.e., only where it is needed. 
  The adaptive refinement generates a sequence of solutions on successively finer meshes, at each stage selecting and refining those elements that are judged to contribute most to the error. 
  The three components of the algorithm are the error indicator function, which computes an estimate of the element error contribution, the mesh refiner, which selects and subdivides elements, and the termination criteria. 
 wwwrohan.sdsu.edu /doc/matlab/toolbox/pde/4fem8.html (275 words) 
