# Definition of *graph theory* in English:

## graph theory

Line breaks: graph the¦ory### noun

[ mass noun]

- The mathematical theory of the properties and applications of graphs.More example sentences
- The problems which attracted him most were problems in combinatorics, graph theory, and number theory.
- Current practitioners make largely ad hoc use of statistics, probability, decision theory, graph theory, and tools from artificial intelligence and expert systems design.
- It used graph theory to visualise mathematical questions and, at least for him, did provide a framework for discovering new mathematical knowledge.