... viscosity solution correspondence principle theorem branches structure theorem canonical operator topologically tame duality xi subequations positively homogeneous of degree sublinear function edge of a monotonicity cone monotonicity cone ix polar seminorm transversality Cone Gårding...

...This introductory chapter explores the correspondence principle, which is brought about by a combination of two points of view. The first is proving comparison principles with respect to a constant-coefficient nonlinear potential theory, in a very straightforward manner, from duality...

...This chapter illustrates the use of the correspondence principle laid out in the previous chapter. This represents the part of the theory in which there is an equivalence between comparison at the potential-theoretic (subequation ℱ) level and the PDE (operator F) level. The chapter...