Joel Friedman's On-Line Publications

(This page is currently under construction-- papers are being added. Let me know if there are particular papers you'd like me to add.)

If a paper has figures, these figures will not be visible with the "dvi" version of the paper.

Here is a remarkable and much shorter proof of the Hanna Neumann Conjecture, which simplifies, generalizes, and clarifies aspects of my sheaf theoretic proof, by Warren Dicks, written entirely in the language of skew group rings.