You can make a line graph in Excel in a matter of seconds using data already entered into the spreadsheet.

In geography it is important to be able to read and understand data that is presented in a range of different ways. We often use graphs to present data in a clear and accessible way. There are many ...

We introduce the notion of the L-core of a graph what enables a simple description of some properties of the eigenspace of the eigenvalue — 2 in generalized line graphs and an elegant formulation of ...