https://hackerpaper.kaipfister.de/p/0706.3359/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMThttps://news.ycombinator.com/item?id=9889674urn:hackerpapers:mention:0706.3359:9889674Wed, 15 Jul 2015 04:12:22 GMT<p>Massless GR is sometimes called &quot;pure gravity&quot;, and is something people are still interested in (or were, last time I was paying attention) [1]. Kind of remarkable that even the base-case has so many open issues. I should re-read that Torretti book, I remember liking his style but that some of the math was over my head at the time. [1] http://arxiv.org/abs/0706.3359</p><p><a href="https://hackerpaper.kaipfister.de/p/0706.3359/">Paper and discussion history</a>. A mention is not an endorsement.</p>hep-th