1. In ancient astronomy in China, "nine to one" has a special meaning. The ancients believed that everything in the world was composed of nine basic elements: heaven, earth, water, fire, wind, thunder, mountains, peace and people. These nine elements influence and restrict each other, and isomorphism becomes the running law of the world. So the ancients called these nine elements "nine to one".
2. In ancient divination, "nine to one" also has an important application. Divination is a method to predict the future. By observing natural phenomena, such as the flying direction of birds and the growth of trees, we can infer good or bad luck in the future. In the process of divination, it is necessary to convert the observed phenomena into numbers, and then use these numbers to calculate and get a result.
This result is the result of "nine to one". In modern computer science, "nine to one" also has important applications. It is often necessary to encrypt and decrypt data in computer programming. In order to improve the security of encryption, a method called "modular operation" is usually adopted. Modular operation is to divide one number by another and then take the remainder.
The related knowledge of mathematical concepts is as follows:
1. Mathematical concept is the basic element in mathematics. They are abstractions and generalizations of some things or phenomena in the real world. Mathematical concepts are the basis of mathematical thinking and the key to our understanding and mastery of mathematics. The formation of mathematical concepts usually goes through three stages: intuitive perception, symbolic representation and logical reasoning.
2. First of all, we need to know and understand this concept through intuitive perception. For example, we can understand the concept of "size" by observing and comparing different objects. Then, we need to use symbols to represent this concept. For example, we can use letters or numbers to represent a number. Finally, we need to deepen our understanding of this concept through logical reasoning.
For example, we can study the properties of numbers through addition and subtraction. There is a close relationship between mathematical concepts. Some concepts are interdependent, for example, addition and subtraction are interdependent, and there is no addition without subtraction. Some concepts are contradictory, such as integer and fraction, and a number cannot be both integer and fraction.