Thursday 4 December 2008

Prove that the difference of the squares of any two odd numbers is divisible by eight.

Posted by speedygeoff on Thursday, December 04, 2008 with
What am I reading this week? "Lewis Carroll in Numberland", by Robin Wilson. I was and still am a student of mathematics and logic, and this is a fascinating biography of the author of the "Alice" books, including samples of his work in mathematics, logic, photography, ciphers, puzzles, paradoxes, and of course writing and poetry. Eye-opening and instructive: I am amazed at the incredibly high standards of education in those days! We had slipped a long long way from that even in the mid twentieth century when I was at school. And as for "these days"...!

I will go back and re-read "Alice in Wonderland" and "Through the Looking Glass" with new insights.

More Sunday snaps












1. Carmen
2. Here's Jodie already...
3. ...thumbs up! (Jodie was way ahead in her first long course race)
4. Bob Chapman
5. Cathy Montalto
6. Neil Boden with a race on his hands... and, strangely, one foot is well off the ground!


Click on any picture to see it full size. Continued tomorrow!