Sidney Graham Professor Department of Mathematics Central Michigan University Mount Pleasant, MI 48859 Office: Pearce 220 Phone: 989.774.3813 Fax: 989.774.2414 E-mail: Sidney.W.Graham@cmich.edu or sidney.w.graham@gmail.com

Fall 2009 Office Hours

• MWF 10-11 am, TWTh 2:30-3:30 pm, TTh 11--12 am, and by appointment.

My Mathematical Interests

I have Erdös number 1, but so do over 500 other people. My one paper with Erdös is on divisors of factorials.

Recreational Mathematics

• What day of the week was July 4, 1776? If you want to learn how to answer questions like this, check out the Doomsday Rule.

 

 
 
 
 
 

• Start with 14 pegs in the following configuration: 

Start jumping pegs as you do in checkers; remove the jumped pegs as you go. Can you end up with just one peg? If you want to learn how to do problems like this, check out Peg Solitaire.

Separated at Birth?

I spent three years working at the National Science Foundation in Arlington, Virginia. People would occasionally mistake me for Representative Peter DeFazio, D-Oregon. Compare for yourself.

Pictures from France

In July 2004, Mary and I went on barge cruise in Burgundy. Here are some pictures from the trip.