Rings – A Symbol of Eternity and Commitment
The circular shape of rings is a symbol of eternity and has been used as a sign of commitment throughout the ages, from engagement and wedding rings to family heirlooms and decorative accessories. From the simplest bands to ornate creations adorned with precious gemstones, rings are worn on all types of fingers and can be made out of almost any hard material. Rings are often a mark of status and affiliation, as well as a statement about the wearer’s style, tastes and preferences. In mathematics, the concept of a ring was first formalized in the 1870s and 1920s with key contributions by Dedekind, Hilbert, Fraenkel and Noether. Rings are a generalization of the Dedekind domains that occur in number theory and of polynomial rings and rings of invariants that occur in algebraic geometry and invariant theory. Although the majority of people wear their rings as simple ornaments, they can also serve various symbolic functions respecting marriage, exceptional achievement, high status or authority and membership in an organization. Rings may be engraved with insignia, used to seal documents and used as a badge of membership. Rings are also used as a type of social security identification card, displaying the month and day in which an employee was born and the date in which the worker began his or her employment. For many people, the most significant function of a ring is in expressing love and commitment. Engagement and wedding rings are the most common examples, and in many cultures, specific fingers have been assigned certain meanings. For example, the fourth finger on the left hand is associated with romantic relationships. The ancient Egyptians were enthusiastic about the use of rings and even wore theirs on both hands. Rings are also used as a sign of friendship and teamwork. Interlocking rings, which evoke the concept of inseparability, have been popular in several cultures. For example, Celtic rings resemble knotwork and can be worn by individuals or in groups. Fashion rings, which usually feature multiple gemstones in a variety of designs and colors, are sometimes known as cocktail rings. They can be very ornate, with elaborately designed metal finishes. Many of these fashion rings are crafted from precious gemstones, but they can also be created with semiprecious stones and synthetic gems. A ring can be worn on any finger, although they are more commonly worn around the thumb or middle and index fingers. They are usually made of metal but can be fashioned from almost any hard material, such as wood or bone, and can also incorporate glass, crystal, jade, and other materials. Rings that are worn on other parts of the body, such as necks or arms, are usually called bracelets. Bands that fit loosely on the finger, like a necklace or armband, are not considered to be rings.