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.