I'd say both weird and coincidental :-). I'm the author of that StackOverflow question and have nothing to do with that paper. As far as I understand arXiv (I'm

I'd say both weird and coincidental :-). I'm the author of that StackOverflow question and have nothing to do with that paper. As far as I understand arXiv (I'm not familiar with it), the paper was submitted to arXiv before the StackOverflow answer that inspired my question, and published by arXiv after my StackOverflow question: https://arxiv.org/list/cs.DS/recent https://arxiv.org/list/cs.DS/recent