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一、概念: 以前所讲的都是单个数列的研究和分析。单个数列在数理统计上叫单维数列。本讲则涉及到两个数列(当然也有多个数列)叫做二维数列。
First, the concept: the previously mentioned are a single series of research and analysis. A single series in mathematical statistics called single-dimensional series. This talk is about two series (of course, there are several series) called two-dimensional series.