Some folders on this site have been renamed; tildes have been removed. If you were looking for pages via a URL such as

www.math.neu.edu/~username/

try

www.math.neu.edu/username/

instead.

And, now you will see a bunch of text that had to be typed to take this file size to over 512 bytes, so that Internet Explorer would display it. All other browsers were displaying this error message fine as it was. If you using Internet Explorer, you might want to consider switching to Firefox or Safari.