Graph theory is a branch of mathematics that ... Tetravalent graphs, also known as 4-valent graphs, are a specific type of graph where each vertex is connected to exactly four edges.

One of the significant areas of research within graph theory is the study of path problems, particularly in grid graphs. Grid graphs are a specific type of graph that can be visualized as a grid ...

Using graphs in geography. Graphs can help you organise and display data you've collected, like facts and figures about sustainable transport. Different types of graph have different uses.

This is the case with an important problem in computer science called "graph isomorphism testing" whereby scientists use algorithms to test whether two graphs are the same. In theory, it cannot be ...