Kind of annoying how the url never changes because of the frames (hence no good way to bookmark). If you start from this page you'll get the exact same page wi

Kind of annoying how the url never changes because of the frames (hence no good way to bookmark). If you start from this page you'll get the exact same page without the frame and be able to bookmark: http://www.math.niu.edu/~rusin/known-math/ http://www.math.niu.edu/~rusin/known-math/