|
Let F be a closed essential surface in a hyperbolic 3–manifold M with a toroidal cusp
N. The depth of F in N is the maximal distance from points of F in N to the
boundary of N. It will be shown that if F is an essential pleated surface which is not
coannular to the boundary torus of N then the depth of F in N is bounded above by
a constant depending only on the genus of F. The result is used to show
that an immersed closed essential surface in M which is not coannular to
the torus boundary components of M will remain essential in the Dehn
filling manifold M(γ) after excluding Cg curves from each torus boundary
component of M, where Cg is a constant depending only on the genus g of the
surface.
|