Now there are many different methods to do the PV-reduction for the one loop amplitudes. Two of them are unitarity cut method and generalized unitarity cut method. In this short paper, we present an explicit connection of these two methods, especially how the extractions of triangle and bubble coefficients are equivalent to each other.

中文翻译：

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一环主积分系数提取的等价性

现在有许多不同的方法可以对单回路幅度进行 PV 降低。其中两种是酉割法和广义酉割法。在这篇简短的论文中，我们展示了这两种方法的明确联系，特别是三角形和气泡系数的提取如何相互等效。