These pairings are often based upon such criteria as common field of study or geographic location.

He defined it as the common field of psychology, sociology and informatics.

Additionally, the peasants would have held lands in the common fields.

They farmed land held in a common large field.

International debt collection is a less common and specialised field.

The common fields were inclosed in 1776, but some inclosures had already been made about 1623.

Residents created a large common field for the animals they were breeding.

He went through standing corn in the common fields, and no one raised a hand to stop him.

The common fields around it were enclosed in 1790 to become parkland for the mansion.

The Smith normal form can be used to determine whether or not matrices with entries over a common field are similar.