Commutative rings are a branch of abstract algebra that deals with the multiplication operation. This book examines the question, given any positive integer n, is there a commutative ring with identity that has n zero-divisions? It also examines this quest

His Royal Highness Prince Edward The Duke of Kent KG GCMG GCVO ADC(P), first cousin to Her Majesty Queen Elizabeth II, has devoted his life to the service of his country. Even before he served twenty-one years as a regular soldier in the British Army, he was introduced to this life of service by his widowed mother, HRH Princess Marina, The Duchess of Kent, during an extensive tour of the Far East at the time of his seventeenth birthday.

His interest in modern technology, especially computing and engineering, in issues of health, fitness and social welfare, and in the development of...

A brief yet comprehensive guide for young people wanting to learn about and be involved with stock market investments.