The warping degree of an oriented knot diagram is the minimal number of crossing changes which are required to obtain a monotone diagram from the diagram. The minimal warping degree of a knot is the minimal value of the warping degree for all oriented minimal diagrams of the knot. In this paper, all prime alternating knots with minimal warping degree two are determined.

中文翻译：

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最小翘曲度为 2 的素交替结

定向结图的翘曲度是从图中获得单调图所需的交叉变化的最小数量。结的最小翘曲度是结的所有有向最小图的翘曲度的最小值。在本文中，确定了所有具有最小翘曲度 2 的素数交替结。