I have decided to move one step towards practising what I preach.
The arXiv is now the de facto place of publication of many mathematics papers; Google Scholar recognises it, as do various other sites such as ResearchGate. So shouldn’t co-authors of papers on the arXiv be on my list of coauthors?
The step I have taken is to include a separate section in my list including people with whom I have a joint paper on the arXiv (or other similar repositories) which has not yet appeared in a more traditional form.
This adds 16 to my previous total of 152 coauthors: I have reached the order of the second non-abelian finite simple group …