Archive for the ‘Uncategorized’ Category

Fun with PDEs

Tuesday, May 1st, 2007

I just finished working on a numerical simulation of a set of partial differential equations (PDE). I developed these equations for a physics research project I'm involved in. The equations did not seem to be solvable analytically, so I had to do it numerically. This was my first attempt at ...

Prime Numbers

Thursday, June 29th, 2006

Here's a nice one. Show that, for any prime number p other than 2 and 5, there is a multiple of p that is written as a series of 1's in decimal representation. For example, 111 is a multiple of 3, and 11 is a multiple of itself. Hint: Use ...