About "0"

0, can be said to be the earliest human contact number. Our ancestors only knew nothing and existence at first, and none of them was 0, so 0 isn't it? I remember the primary school teacher once said, "Any number minus itself is equal to 0, and 0 means there is no number." This statement is obviously incorrect. As we all know, 0 degrees Celsius on the thermometer indicates the freezing point of water (that is, the temperature of ice-water mixture at standard atmospheric pressure), where 0 is the distinguishing point between solid and liquid water. Moreover, in Chinese characters, 0 means more as zero, such as: 1) fragmentary; A small part. 2) The quantity is not enough for a certain unit ... At this point, we know that "no quantity is 0, but 0 not only means no quantity, but also means the difference between solid and liquid water, and so on."

"Room 203 105 in 2003", although all of them are zeros, they are roughly similar in appearance; They have different meanings. 0 indicator vacancy of 105 and 2003 cannot be deleted. 0 in Room 203 separates "Building (2)" from "House Number". (3) "(that is, Room 8 on the second floor) can be deleted. 0 also means that ...

As a primary school student, my ability is limited after all, and my understanding of 0 is not thorough enough. In the future, I hope (including action) to find "my new continent" in the "ocean of knowledge".

2

What is mathematics?

What is mathematics? Some people say, "Isn't mathematics the knowledge of numbers?"

That's not true. Because mathematics not only studies "number" but also "shape", triangles and squares, which are familiar to everyone, are also the objects of mathematical research.

Historically, there have been various views on what mathematics is. Some people say that mathematics is correlation; Some people say that mathematics is logic. "Logic is the youth of mathematics, while mathematics is the prime of logic."

So, what is mathematics?

Engels, the great revolutionary tutor, stood at the theoretical height of dialectical materialism, profoundly analyzed the origin and essence of mathematics and made a series of incisive scientific conclusions. Engels pointed out that "mathematics is a quantitative science" and "the object of pure mathematics is the spatial form and quantitative relationship of the real world". According to Engels' point of view, it is more accurate to say: mathematics-a science that studies the quantitative relationship and spatial form of the real world.

Mathematics can be divided into two categories, one is pure mathematics and the other is applied mathematics.