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

'John is a hero to many private investors in the UK. By tucking money away year after year, and choosing his investments wisely, he has accumulated a portfolio worth more than GBP1 million.' The Motley Fool 'I'm a big fan of the writings of John Lee. John Lee moves the market.' Monevator 'Lord (John) Lee of Trafford was one of the first UK investors to build an ISA portfolio worth more than GBP1 million, reaching that landmark in 2003.' Daily Telegraph, March 2012 John Lee is one of the UK's most successful private investors. Beginning with an investment pot of GBP125,000 in the early 1980s,...

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...

An autobiography shaped by birds and a personal obsession that has carried the author through life.

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

Lonely Planet's Best of Canada is your most up-to-date advice on what to see and skip, and what hidden discoveries await you. Experience the grandeur of the Rockies, wander the lanes in Quebec City, and hit the slopes on the outskirts of Vancouver - all with your trusted travel companion.