PDEs: behavior along a singular curve?

Suppose one has the following PDE in (x,y): a(x,y)*(fxx + fyy) + b(x,y)*fx = e(f), (1) where fx= partial f/partial x, etc, and where a(x=1,y) = 0, so that along the line x=1, the PDE...

30 December 2021 6,940 2 View