## About the author

I am a pure mathematician, mainly working in group theory and representation theory. I spent 17 years employed by the University of Birmingham, followed by 12 years at Queen Mary University of London, before taking early retirement at the end of 2016. Since 2007 I have become more and more interested in the applications of group theory and representation theory in the foundations of physics. My initial impression was that the group theory was confusing and difficult to follow. Gradually I acquired some clarity, and noticed that some bits were actually wrong. Eventually I came to the conclusion that essentially all of it is wrong.

Robert Wilson.