The concept of zero, which seems simple and intuitive today, has a rich and complex history spanning centuries and cultures. So can factorial only be defined in 0 and positive integers? It was thought that 0, that is, without anything, was meaningless and therefore not a number.
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Natural numbers may or may not include 0, but the fact that 0 is an integer. However, when writing numbers, because the number of strokes is complicated, it is usually replaced with a simplified round shape, 〇. 0 is the smallest non-negative integer.
However, in other cases, 0 can be defined as a natural number.
In mathematical terminology, 0 is the additive identity. 0 is the smallest non-negative integer. In this respect, compared to other numbers from 1 to 9, 0 is definitely. Adding (or subtracting) 0 to any number leaves that number unchanged;
But it doesn't say '0 apples'. Even outside the framework of numbers, 0 was excluded from operations such as addition and multiplication. From the beginning, number was thought to have been created to 'count' the number of objects. The natural number next to 0 is 1, and 0 is not the next natural number.
In the KBO league, No. 0 Gong Pil-seong and Kim Kang-min, and No. 0 Kim Gyeong-gi can be said to be representative examples.
Gong Pil-seong, a leading player with number 0 in the 1990s and 2000s, had no choice but to change his uniform number during his third year as a professional. 0 (zero) is a number representing an empty quantity. Natural numbers may or may not include 0, but this does not affect the fact that 0 is an integer. Zero, represented by the number 0, is the basic structure of the number system.
Just as 1, 2, 3 are 一, 2, 3 in Chinese characters, 0 is ‘zero’ in Chinese characters. The natural number next to 0 is 1, and 0 is not the next natural number. Euler, a Swiss mathematician in the 18th century, expanded the factorial to be defined in all numbers, like this.
