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We demonstrate that the contact cosmetic surgery conjecture holds true for all non-trivial Legendrian knots, with the possible exception of Lagrangian slice knots. We also discuss the contact cosmetic surgeries on Legendrian unknots and…

Geometric Topology · Mathematics 2025-03-07 John B. Etnyre , Tanushree Shah

We consider the cosmetic surgery problem for two-bridge knots in the 3-sphere. It is seen that all the two-bridge knots at most 9 crossings other than $9_{27} = S(49,19)=C[2,2,-2,2,2,-2]$ admits no purely cosmetic surgery pairs. Then we…

Geometric Topology · Mathematics 2016-05-25 Kazuhiro Ichihara , Toshio Saito

A knot in the 3-sphere is called an L--space knot if it admits a nontrivial Dehn surgery yielding an L--space. Like torus knots and Berge knots, many L--space knots admit also a Seifert fibered surgery. We give a concrete example of a…

Geometric Topology · Mathematics 2014-10-16 Kimihiko Motegi , Kazushige Tohki

We study cosmetic surgeries on a knot in a homology sphere. Several constraints on knots and surgery slopes to admit such surgeries are given. Our main ingredient is the rational surgery formula of the Casson--Walker invariant for…

Geometric Topology · Mathematics 2025-09-30 Kazuhiro Ichihara , In Dae Jong

The cosmetic surgery conjecture predicts that for a non-trivial knot in the three-sphere, performing two different Dehn surgeries results in distinct oriented three-manifolds. Hanselman reduced the problem to $\pm 2$ or $\pm 1/n$ surgeries…

Geometric Topology · Mathematics 2025-03-24 Aliakbar Daemi , Mike Miller Eismeier , Tye Lidman

We study cosmetic contact surgeries along transverse knots in the standard contact 3-sphere, i.e. contact surgeries that yield again the standard contact 3-sphere. The main result is that we can exclude non-trivial cosmetic contact…

Geometric Topology · Mathematics 2026-02-10 Marc Kegel

We present new obstructions for a knot K in S^3 to admit purely cosmetic surgeries, which arise from the study of Witten-Reshetikhin-Turaev invariants at fixed level. In particular, we strengthen a recent result of Hanselman, showing that…

Geometric Topology · Mathematics 2021-11-05 Renaud Detcherry

In this paper, we prove that there are no truly cosmetic surgeries on genus one classical knots. If the two surgery slopes have the same sign, we give the only possibilities of reflectively cosmetic surgeries. The result is an application…

Geometric Topology · Mathematics 2009-04-28 Jiajun Wang

We will classify all exceptional Dehn surgeries on 2-bridge knots according to whether they produce reducible, toroidal, or small Seifert fibered manifolds.

Geometric Topology · Mathematics 2007-05-23 Mark Brittenham , Ying-Qing Wu

Let K be a knot in S^3, and M and M' be distinct Dehn surgeries along K. We investigate when M covers M'. When K is a torus knot, we provide a complete classification of such covers. When K is a hyperbolic knot, we provide partial results…

Geometric Topology · Mathematics 2021-10-12 Keegan Boyle

We use the combinatorial techniques of graphs of intersection to study reducible Dehn surgeries on knots in the three-sphere. In particular, in the event that a reducible surgery on a knot K in the three-sphere of slope r produces a…

Geometric Topology · Mathematics 2014-10-14 Nicholas Zufelt

We show that a special alternating knot with sufficiently large number (more than $63$) of twist regions has no chirally cosmetic surgeries, a pair of Dehn surgeries producing orientation-reversingly homeomorphic $3$-manifolds. In the…

Geometric Topology · Mathematics 2023-01-25 Tetsuya Ito

We construct infinite families of chirally cosmetic surgeries on chiral hyperbolic knots and purely cosmetic surgeries on hyperbolic manifolds with multiple cusps, disproving conjectures that these phenomena do not appear, including Problem…

Geometric Topology · Mathematics 2026-04-06 Qiuyu Ren

This paper concerns the truly or purely cosmetic surgery conjecture. We give a survey on exceptional surgeries and cosmetic surgeries. We prove that the slope of an exceptional truly cosmetic surgery on a hyperbolic knot in $S^3$ must be…

Geometric Topology · Mathematics 2019-02-20 Huygens C. Ravelomanana

Suppose F is a compact orientable surface, K is a knot in F x I, and N is the 3-manifold obtained by some non-trivial surgery on K. If F x {0} compresses in N, then there is an annulus in F x I with one end K and the other end an essential…

Geometric Topology · Mathematics 2014-10-01 Martin Scharlemann , Abigail Thompson

Let K' be a knot that admits no cosmetic crossing changes and let C be a non-trivial, prime, non-cable knot. Then any knot that is a satellite of C with winding number zero and pattern K' admits no cosmetic crossing changes. As a…

Geometric Topology · Mathematics 2018-07-12 Cheryl Jaeger Balm , Efstratia Kalfagianni

The Cabling Conjecture states that surgery on hyperbolic knots in $S^3$ never produces reducible manifolds. In contrast, there do exist hyperbolic knots in some lens spaces with non-prime surgeries. Baker constructed a family of such…

Geometric Topology · Mathematics 2017-08-08 Fyodor Gainullin

We show that certain negatively twisted torus knots admit Dehn surgeries yielding 3-manifolds with non left-orderable fundamental groups.

Geometric Topology · Mathematics 2017-10-06 Kazuhiro Ichihara , Yuki Temma

We prove that the (p,q)-cable of a knot K in S^3 admits a positive L-space surgery if and only if K admits a positive L-space surgery and q/p \geq 2g(K)-1, where g(K) is the Seifert genus of K. The "if" direction is due to Hedden.

Geometric Topology · Mathematics 2011-11-29 Jennifer Hom

We prove that, for each fixed rational number $p/q \in \mathbb{Q}$, there exists a pair of distinct knots whose $p/q$-surgeries are orientation-preservingly homeomorphic. This confirms a 1978 conjecture of Gordon.

Geometric Topology · Mathematics 2025-08-20 Kyle Hayden , Lisa Piccirillo , Laura Wakelin