二十世纪七十年代，道格拉斯·莉娜的“自动数学家”程序自动生成数学定理，但是被证明基本上毫无用处。
In the 1970s, Douglas Lenat's Automated Mathematician automatically generated mathematical theorems, but they proved largely useless.
时间序列作为二十世纪近代统计学的一个分支现在已成为数学界、工程界和经济学界应用最多、最广的课题之一。
As a branch of pre-modern statistics in 20th century, time series nowadays has become one of the most used and the most widely used topics in math, engineering and economic fields.
二十世纪五十年代以来，双曲型守恒律方程数值计算方法的研究一直是计算数学中的一个重要研究方向。
Since 1950' s, the research of numerical method for hyperbolic conservation laws is one of key research directions in computational mathematics.
二十世纪五十年代以来，双曲型守恒律方程数值计算方法的研究一直是计算数学中的一个重要研究方向。
Since 1950' s, the research of numerical method for hyperbolic conservation laws is one of key research directions in computational mathematics.
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