This article is devoted to the study of prime alternating +achiral knots. In the case of arborescent knots, we prove in +AAA Visibility Theorem 5.1, that the symmetry is visible on a certain projection (not necessarily minimal) and that it is realised by a homeomorphism of order $4$. In the general case (arborescent or not), if the prime alternating knot has no minimal projection on which +achirality is visible, we prove that the order of +achirality is necessarily equal to $4$.

中文翻译：

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关于交替结的+非手性的可见性

本文致力于主要交替+非手性结的研究。在树状结的情况下，我们在+ AAA可见性定理5.1中证明，对称性在某个投影上可见（不一定是最小的），并且可以通过阶次同构$ 4 $实现。在一般情况下（无论是否呈树状），如果主要交替结没有最小可见的非手性投影，则我们证明+非手性的阶必定等于$ 4 $。