This issuePrevious ArticleA dual-Petrov-Galerkin method for extended fifth-order Korteweg-de Vries type equationsNext ArticleExistence of nodal solutions of multi-point boundary value problems
We reduce the question of local nonsolvability of the Darboux
equation, and hence of the isometric embedding problem for
surfaces, to the local nonsolvability of a simple linear equation
whose type is explicitly determined by the Gaussian curvature.