Walker & Co

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Q.E.D. presents some of the most famous mathematical proofs in a charming book that will appeal to nonmathematicians and math experts alike. Grasp in an instant why Pythagoras's theorem must be correct. Follow the ancient Chinese proof of the volume formula for the frustrating f…

Q.E.D. presents some of the most famous mathematical proofs in a charming book that will appeal to nonmathematicians and math experts alike. Grasp in an instant why Pythagoras's theorem must be correct. Follow the ancient Chinese proof of the volume formula for the frustrating f…

In the Depression summer of 1932, some 45,000 veterans of World War I descended on Washington to demand the bonus promised them eight years earlier for their wartime service. They lived in shantytowns, white and black together, protested and rallied for their cause. Roy Wilkins …

In the Depression summer of 1932, some 45,000 veterans of World War I descended on Washington to demand the bonus promised them eight years earlier for their wartime service. They lived in shantytowns, white and black together, protested and rallied for their cause. Roy Wilkins …

In the Depression summer of 1932, some 45,000 veterans of World War I descended on Washington to demand the bonus promised them eight years earlier for their wartime service. They lived in shantytowns, white and black together, protested and rallied for their cause. Roy Wilkins …