Non-positive at infinity valuations are a class of real plane valuations which have a nice geometrical behavior. They are divided in three types. We study the dual graphs of non-positive at infinity valuations and give an algorithm for obtaining them. Moreover we compare these graphs attending the type of their corresponding valuation.

中文翻译：

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无穷大平面非正值的离散等价

无穷大估值的非正值是一类具有良好几何行为的真实平面估值。它们分为三种类型。我们研究了无穷大估值的非正对偶图，并给出了获得它们的算法。此外，我们比较了这些图表，了解它们对应的估值类型。