# Notation resources

### Quick Reference (3)

Mathematical Symbols and Abbreviations

This leaflet provides information on symbols and notation commonly used in mathematics. It shows the meaning of a symbol and, where necessary, an example and an indication of how the symbol would be said. For further information from mathcentre resources, a search phrase is given. This Quick Reference leaflet is contributed to the mathcentre Community Project by Janette Matthews and reviewed by Tony Croft, University of Loughborough.

Sigma notation

Sigma notation provides a concise and convenient way of writing long sums. This leaflet explains how.

The modulus of a number

This leaflet explains what is meant by the modulus, or absolute value of a number. (Engineering Maths First Aid Kit 1.5)