“real number”的概念、定义、习题解题方法及翻译-数学辞典

单词

real number

释义

real number

The numbers generally used in mathematics, scientific work, and everyday life are the real numbers. They can be pictured as points of a real line, with the integers equally spaced along the line and a real number b to the right of a real number a if a < b. The set of real numbers is usually denoted by R. As a set, R is uncountable.

Every real number is either rational or irrational, and every real number has an expression as a decimal representation.

The set of real numbers forms an ordered field. The completeness axiom of the real numbers then uniquely characterizes R. See order (real numbers).

The real number line

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数学辞典收录了4151条数学词条，基本涵盖了常用数学知识及数学英语单词词组的翻译及用法，是数学学习的有利工具。