Graph theory, a nearly 300-year-old discipline considered an element of discrete mathematics, is used to model many types of relationships and processes in physical, biological, social and information ...

But in the world of graph theory, the conjecture predicts that the tiling always ... so long as it doesn’t contain any closed loops. These types of graphs are called trees. Ringel’s question was about ...

There’s actually a very well established branch of mathematics called graph theory that covers the ... While there are a number of different types of graphs, the last few years have seen the ...

This is the case with an important problem in computer science called "graph isomorphism testing" whereby scientists use ...

he shows how to construct a type of tensor product that requires fewer colors than either of its constituent graphs. All exponential graphs, in fact, have this property: The tensor product that ...

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.