Minor change in nonlinear.  TODO: write up fd-coloring in Chapter 4, print out the book and only make minor/editorial changes, and send it out!.
Minor change in nonlinear.  TODO: write up fd-coloring in Chapter 4, print out the book and only make minor/editorial changes, and send it out!.

bueler/p4pdes,bueler/p4pdes,bueler/p4pdes,bueler/p4pdes