- 1 - Wikipedia
1 (one, unit, unity) is a number, numeral, and glyph It is the first and smallest positive integer of the infinite sequence of natural numbers
- 1（自然数之一）_百度百科
1，是一个阿拉伯数字。 1是一个自然数，是最小的正整数，是最小的正奇数。 1是一个有理数，是一位数，也是奇数。 1既不是质数也不是合数。 1的n次方（n∈R）都等于1。 1的倒数是它本身。 一个或者几个事物所组成的整体，可以看作是单位“1”。
- 如何定义什么是 1？ - 知乎
我们可以从数学上证明 1+1=2，但是如何定义 1 是什么。如果说是 0 的后继数，那又如何定义 0 呢？
- 1 (number) - New World Encyclopedia
The glyph used today in the Western world to represent the number 1, a vertical line, often with a serif at the top and sometimes a short horizontal line at the bottom, traces its roots back to the Indians, who wrote 1 as a horizontal line, as is still the case in Chinese script
- Number 1 - Curious Math Facts and Interesting Properties
Explore the curious properties of number 1, an odd number which is uniquely neither prime nor composite Includes mathematical info, prime factorization, divisors, bases and much more!
- 1 (number) | Math Wiki | Fandom
1 is the Hindu-Arabic numeral for the number one (the unit) It is the smallest positive integer, and smallest natural number 1 is the multiplicative identity, i e any number multiplied by 1 equals itself, for example: a ⋅ 1 = a {\displaystyle a \cdot 1=a} and 1 × a = a {\displaystyle 1\times
- 1 - 维基百科，自由的百科全书
在数学中，1为乘法单位元，即任何数字与1相乘皆等于其本身。 按照惯例，1不被视为素数。 在数字电路中，1表示 二进制 中的“开启”状态，是计算技术的基础。 在 哲学 领域，1在诸多传统中象征着终极现实或存在的本源。
- 1 (Number)
In scientific notation, it is written as 1 × 10 0 It has a total of 0 prime factors and 1 positive divisors There is one positive integer (up to 1) that is relatively prime to 1 The prime factorization of 1 is 1 Since it has a total of 0 prime factors, 1 is a composite number
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