Thanks for adding this anecdote. Is it the same mathematician who worked on almost periodic functions ? I have run into those in my line of work. On second thoughts, I guess that's what Fastperiodische Funktionen means.

On a different note this would be the third example where the person concerned is Danish.

Was entertained by how you wrote about all those relations and associations it felt like those logic puzzles https://en.wikipedia.org/wiki/Zebra_Puzzle