The well-known author of the "Mathematical Recreations" column in Scientific American explains the key concepts in math and their implications, pointing out that although mathematics is totally unreal--an entirely mental construct--it is the best tool available for describing and understanding the real world. Illustrations.
(retrieved from Amazon Thu, 12 Mar 2015 18:09:30 -0400)
It's a perfect day for a picnic so Hen picks some berries, Goose picks some apples and Duck picks some pears. Then the three friends set off to look for the perfect spot to enjoy their feast. But the three friends aren't the only ones who are hungry.