他是一位数字（numbers）、数论（number theory）、级数（progressions）和数字级数（progression of numbers）的研究者。他的交易系统基于自然法则和数学。
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哈克认为，这样的课程可以弥补成年人在数字方面的盲点，这些人已经完成了像代数这样的高级数学，但却无法按面积计算出一块地毯的价格。
Such courses, Hacker argues, are a remedy for the numerical illiteracy of adults who have completed high-level math like algebra but are unable to calculate the price of a carpet by area.
同时，数字计算机的处理能力、存储空间和带宽正呈几何级数增长。
Meanwhile, digital computers are increasing exponentially in processing power, memory storage and communications bandwidth.
由于绝大部分运行级数字都定义了明确的含义，因而它们基本上是“众所周知”的。
These runlevel numbers are on the whole "well-known," in the sense that most of them have very clearly defined meanings.
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