I’m a few months late with this, but my colleague Jason Ermer at Collaborative Mathematics has published Challenge 14 on his website: http://www.collaborativemathematics.org/
See also http://www.collaborativemathematics.org/challenge14.html
I’m a few months late with this, but my colleague Jason Ermer at Collaborative Mathematics has published Challenge 14 on his website: http://www.collaborativemathematics.org/
See also http://www.collaborativemathematics.org/challenge14.html