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What are the general applications of discrete mathematics? How to use it?
Discrete mathematics is just a general term, which includes all mathematics with discrete variables as elements. Its characteristics are often concrete and can be illustrated by examples in real life. This is different from some abnormal abstract branches of mathematics (such as functional and topology). Mathematical logic is one of the research fields of theoretical computer, and the research work in Europe is very good. It is mainly used for logical calculus of artificial intelligence and database.

Model design of the field, etc. Modern algebra is the basic tool of modern algebra, which talks about three basic algebraic structures: group, ring and field. In the study of number theory,

Some frontier topics are described by them, and number theory is the basic algorithm design tool of computer cryptography, and the "graph theory" mentioned upstairs is also very important.

"Graph Theory" originally belonged to the course of "Combinatorial Mathematics", but it developed vigorously in the 20th century. Graph, an abstract model, is used in many fields of computers, and Petri nets are also used.

Network model and network flow (AOV, AOE) diagram in engineering need the help of graph theory to guide algorithm design. These are just some typical examples, and discrete mathematics has many uses.

It can be said that without discrete mathematics, more broadly speaking, without mathematics, computers cannot develop at all.