After reading this:<br><br>"It doesn't matter what mathematical things are: it's what they do that counts. Thus mathematics hovers uneasily between the real and the not real; its meaning does not reside in formal abstractions, but neither is it tangible. This may cause problems with philosophers who like tidy categories, but it is the great strength of mathematics -- what I have elsewhere called its 'unreal reality.' Mathematics links the abstract world of mental concepts to the real world of physical things without being located completely in either." - Ian Stewart, What is Mathematics?<br><br>...I was hooked and after reading it several times, I still can't put it down! Great job to all who contributed to creating this masterpiece.