The authors prove that the singular set of a harmonic map from a smooth Riemammian domain to a Riemannian DM-complex is of Hausdorff codimension at least two. They also explore monotonicity formulas and an order gap theorem for approximately harmonic maps. These regularity results have applications to rigidity problems examined in subsequent articles.
Y. Eliashberg, Nikolai M. Mishachev, Susumu Ariki. : U —> U X D? such that ...
The reader will find that, with a few notable exceptions, most instances of the $h$-principle can be treated by the methods considered here. A special emphasis in the book is made on applications to symplectic and contact geometry.
Differential Geometry of Manifolds
This Book Analysis On Manifolds Covers The Basis Topics Needed For The Study Of Different Branches Of Mathematics And Physics Such As Differential Geometry, Differential Equations, And Theoretical Physics.