Non-smoothable surfaces in the 4-sphere
Abstract
We construct examples of non-smoothable surfaces in the 4-sphere, thereby answering Question 4.32 on the K3 problem list. These surfaces are non-orientable and have knot group of order 2, thus simultaneously answering Question 4.29(a) on the K3 problem list.
0
Turn this paper into a full lesson
ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.