I just received: [this article from Quanta Magazine](https://www.quantamagazine.org/with-category-theory-mathematics-escapes-from-equality-20191010/?utm_source=Quanta%20Magazine&utm_campaign=388bce3947-RSS_Daily_Mathematics&utm_medium=email&utm_term=0_f0cb61321c-388bce3947-390055049&mc_cid=388bce3947&mc_eid=7e8b115353)
 and have a question about this paper [to which they link.](https://arxiv.org/pdf/math/0608040v1.pdf)


What is the significance of the date on the first page?


Has the paper been hacked?



Question about an arxiv paper
I downloaded the source code of [Lurie's paper](https://arxiv.org/abs/math/0608040v1.pdf) and compiled the TeX file. The date shown on the first page is today's date (inserted by default since no date is specified). So this would confirm Andy Putman's suggestion that April 1, 2019 is the date the paper was last compiled at arXiv.org. ArXiv removes compiled versions of papers after some time, so apparently this paper from 2008 had not been accessed recently.


![](https://ilorentz.org/beenakker/MO/Lurie.png)


