
4-dimensional
Smooth 4-dimensional Schoenflies problem ★★★★
Author(s): Alexander
Problem Let
be a
-dimensional smooth submanifold of
,
diffeomorphic to
. By the Jordan-Brouwer separation theorem,
separates
into the union of two compact connected
-manifolds which share
as a common boundary. The Schoenflies problem asks, are these
-manifolds diffeomorphic to
? ie: is
unknotted?












Keywords: 4-dimensional; Schoenflies; sphere
