所用的工具为不动点指数理论。

The main tool used was the theory of the fixed-point index.

youdao

布尔矩阵的指数理论已经得到了广泛的研究。

There is an extensive literature on the index theory of Boolean matrices.

youdao

选择指数理论自提出以来，在育种上有了广泛的应用。

Selection index method has been widely applied in breeding since it was advanced.

youdao

In 1957, they reformulated it and they called it the Standard & Poor 500, but I'm using their long theories, back to 1871, so I can't call it the 500; I'm calling it the Composite.

在1957年,他们将其重建,并命名为标准普尔500指数,但这里用到的是1871年发布的理论,所以不能称之为500,我称之为综合指数

耶鲁公开课 - 金融市场课程节选