In mathematics, a metric or distance function is a function which defines a distance between elements of a set. A set with a metric is called a metric space. A metric induces a topology on a set but ...

Ultrametric spaces are specialised metric spaces in which the distance function obeys a strong triangle inequality: for any three points, the distance between two of them does not exceed the larger of ...

Misericordia University teacher education and Math Club students offered lessons on measuring with meters, and weighing things by cubic centimeters during a fun and entertaining Metric Math Day at St.

Education minister Elizabeth Truss has announced that the new primary curriculum will put more focus on imperial measurements. What do teachers, mathematicians and scientists think? Kay Gerrett, ...