3 papers
math.GT2010
Boundary-twisted normal form and the number of elementary moves to unknot
Chan-Ho Suh
Suppose is an unknot lying in the 1-skeleton of a triangulated 3-manifold with tetrahedra. Hass and Lagarias showed there is an upper bound, depending only on , for the…
math.GT2010
The Unknotting Problem and Normal Surface Q-Theory
Chan-Ho Suh
Tollefson described a variant of normal surface theory for 3-manifolds, called Q-theory, where only the quadrilateral coordinates are used. Suppose is a triangulated, compact,…
math.GT2007
Normal Surface Theory in Link Diagrams
Chan-Ho Suh
This paper has been withdrawn by the author, due to a significant error in section 4.3.1.