标题： 两个有趣的强可逆L-空间纽结 显示英文标题

标题： Two curious strongly invertible L-space knots

摘要： 我们展示了两个强可逆的L-空间纽结的例子，它们的手术永远不会是三维球面上一个Khovanov薄链的二重分支覆盖。 因此，这些纽结为Watson提出的强可逆L-空间纽结的猜想性表征提供了反例。 我们还讨论了这两个纽结的其他特殊性质，例如，这两个L-空间纽结的形式半群实际上是半群。 显示英文摘要

摘要： We present two examples of strongly invertible L-space knots whose surgeries are never the double branched cover of a Khovanov thin link in the 3-sphere. Consequently, these knots provide counterexamples to a conjectural characterization of strongly invertible L-space knots due to Watson. We also discuss other exceptional properties of these two knots, for example, these two L-space knots have formal semigroups that are actual semigroups.