Montesinos Amilibia, José MaríaBoileau, MichelGonzález Acuña, Francisco Javier2023-06-202023-06-201987-010025-583110.1007/BF01450747https://hdl.handle.net/20.500.14352/57722W. Whitten conjectured [Pacific J. Math. 97 (1981), no. 1, 209–216] that no 3-manifold obtained by a nontrivial surgery on a double of a noninvertible knot is a 2-fold branched covering of S3. The authors give counterexamples to this conjecture and determine the exact range of validity of the conjecture. More generally, they consider closed, orientable 3-manifolds obtained by nontrivial Dehn surgery on a double of a non-strongly invertible knot and study the symmetries of such manifolds, i.e. the homeomorphisms of finite order on these manifolds. They show that, except for a finite number of surgeries, these manifolds admit no (nontrivial) symmetry.engjournal articlehttp://www.springerlink.com/content/g541h3376w7517jx/http://www.springerlink.com/restricted access515.1symmetries of 3-manifoldsDehn surgeries on a double of a noninvertible knot2-fold branched covers of S 3Topología1210 Topología