2 papers
math.GT2021
Pseudo-isotopies and diffeomorphisms of 4-manifolds
Oliver Singh
A diffeomorphism of a compact manifold is pseudo-isotopic to the identity if there is a diffeomorphism of which restricts to on , and which r…
math.GT2019
Distances between surfaces in 4-manifolds
Oliver Singh
If and are homotopic embedded surfaces in a -manifold then they may be related by a regular homotopy (at the expense of introducing double points) or by a sequence of s…