Associate Editor comments

[labarba]

Editor
Comments to the Author:

The reviewers have made a number of useful comments that I feel will overall improve the manuscript. In particular, I direct the authors attention to comments about the stability of the problem, and there are some specific suggestions that the reviewers make that could improve clarity of language. Otherwise, I too agree with the reviewers that this paper is very important, and I look forward to seeing its impact on the field.