Gordon, Cameron McAMontesinos Amilibia, José María2023-06-212023-06-2119860025-583110.1007/BF01458613https://hdl.handle.net/20.500.14352/64868It is known that every closed, orientable 3-manifold contains a fi-bered knot—a simple closed curve whose complement is a surface bundle over S1. For K such a fibered knot in a rational homology 3-sphere M it is shown that for any compact submanifold X of M containing K as a null-homologous subset, each component of ∂X is compressible in M−K. If K is a doubled knot (bounds a disk with one clasp) then it follows that K is a double of the trivial knot. More generally, it follows that the genus of X (minimum number of one-handles) is less than the genus of M.engjournal articlehttp://link.springer.com/article/10.1007%2FBF01458613http://www.digizeitschriften.de/dms/gcs-wrapperrestricted access515.1null-homotopic knot in a closedorientable 3-manifolddisk-with-claspsfibred knotnull-homotopic in a handlebody of genus 2Topología1210 Topología