Archive for the ‘Books’ Category
Monday, July 19th, 2010
Many properties of primes are very difficult to determine and prove. Here's an exploration that's within reach of many of us:
What is interesting about the difference of the squares of most any two primes? In other words, what is interesting about p12-p22 for most primes p1 and p2? When does ...
Posted in Exploration | 11 Comments »
Thursday, October 29th, 2009
Every now and then I like to buy old Math books. I buy them on Ebay. Most of the books I buy are from the early 1900's or the tail end of the 1800's. Yesterday, I happened upon this book:
Yes, it's from 1863. Yes, I paid $6.50 for it ...
Posted in Books | 2 Comments »
Monday, October 8th, 2007
Purdue Professor of Computer Science Greg N. Fredrickson is an absolute master of geometric dissections, the art and science of cutting up one or more geometric shapes and rearranging the pieces to form other shapes.
One example from Fredrickson’s web-site for his first book, Dissections: Plane & Fancy, is ...
Posted in Geometry, Books | No Comments »
Monday, October 8th, 2007
I had never given much thought to how area codes were selected. I always assumed they were random three digit numbers that, once upon a time, always had 0 or 1 as their middle digit. This morning I was browsing The Universal Book of Mathematics: From Abracadabra to Zeno’s Paradoxes ...
Posted in Fun, Trivia, Books | 2 Comments »
