## Problems in low-dimensional topology.(English)Zbl 0892.57013

This paper was developed from a lecture given by the author at the International Conference on Surgery and Controlled Topology held at Josai University in September 1996. It collects problems in four-dimensional topology, especially concerning embeddings of 2-disks and 2-spheres needed for surgery and $$s$$-cobordisms of 4-manifolds, uniqueness questions for 4-manifolds arising from the study of isotopies, and handlebody structures on 4-manifolds. Finally, the author discusses also a triangulation problem for certain 3- and 4-dimensional stratified spaces.

### MSC:

 57N13 Topology of the Euclidean $$4$$-space, $$4$$-manifolds (MSC2010)