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A Knot in
is a slice knot if it bounds a Disk
in
which has a Tubular Neighborhood
whose intersection with
is
a Tubular Neighborhood
for
.
Every Ribbon Knot is a slice knot, and it is conjectured that every slice knot is a Ribbon Knot.
See also Ribbon Knot, Tubular Neighborhood
References
Rolfsen, D. Knots and Links. Wilmington, DE: Publish or Perish Press, p. 218, 1976.