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  • 1 - Wikipedia
    1 (one, unit, unity) is a number, numeral, and grapheme 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”。
  • 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
  • 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
  • Number 1 - Curious Math Facts and Interesting Properties
    In a nutshell 1 is an odd number which is uniquely neither prime nor composite It is known as the multiplicative identity or unit It’s also the only positive number with no other divisors
  • 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。
  • The number one - Britannica
    The number 1 symbolized unity and the origin of all things, since all other numbers can be created from 1 by adding enough copies of it For example, 7 = 1 + 1 + 1 + 1 + 1 + 1 + 1
  • 1 - Wiktionary, the free dictionary
    Tenth century “West Arabic” variation of the Nepali form of Hindu-Arabic numerals (compare Devanagari script १ (1, “éka”)), possibly influenced by Roman numeral Ⅰ, both ultimately from using a single stroke to represent the number one


















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