#### Deep and Shallow Slice Knots in 4-manifolds

Joint with Michael Klug:
We study knots in the boundary of a 4-manifold X which bound a properly embedded
disk in X, but which are not null-concordant in a collar neighborhood
\partial X x [0,1] of the boundary.

arXiv:2009.03053

Deeply Slice Knots (.pdf, handwritten notes)