The small ring and the area within it are often called the pentagon, as it has a pentagonal shape.

The rings for which such a theorem exists are called Euclidean domains.

In general, a ring which satisfies the zero-product property is called a domain.

A ring in which the zero-product property holds is called a domain.

The middle ring covered an area out to forty miles from the carrier and was called the missile defense zone.

These 'mimicry rings' are called tiger, red, blue and orange for short.

A ring is called reduced if it has no nonzero nilpotent.

The outer ring of the shadow is called the penumbra.

The third ring contains housing for the working-class and is called the zone of independent workers' homes.

This ring is called the zone of better residences.