https://hackerpaper.kaipfister.de/p/1606.06620/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMThttps://news.ycombinator.com/item?id=14115263urn:hackerpapers:mention:1606.06620:14115263Fri, 14 Apr 2017 16:08:38 GMT<p>In the penultimate paragraph, they say, &quot;As a result, the authors were able to prove that when you begin by fixing the angle in advance, the maximum number of equiangular lines is 2d – 2 for one particular angle (approximately 70.7 degrees), and no more than 1.93d for any other angle.&quot; Earlier, they show that in 3 dimensions, you can arrange 6 lines. 2 &gt; 1.93, so I guess either I or they misunderstood something. [Edit] &quot;for…sufficiently large n&quot; https://arxiv.org/abs/1606.06620 “in this paper we prove that for every fixed angle θ and sufficiently large n there are at most 2n−2 lines in ℝn…</p><p><a href="https://hackerpaper.kaipfister.de/p/1606.06620/">Paper and discussion history</a>. A mention is not an endorsement.</p>math.CO