https://hackerpaper.kaipfister.de/p/0801.0287/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMThttps://news.ycombinator.com/item?id=32171421urn:hackerpapers:mention:0801.0287:32171421Wed, 20 Jul 2022 20:03:12 GMT<p>2/2 [sorry that this will be out of order] For a (physical) relativist, the speed of light is really simple. c = 1, everywhere and everywhen. &lt;https://en.wikipedia.org/wiki/Geometrized_unit_system&gt; This is because we have excellent evidence for the utility of &lt;https://en.wikipedia.org/wiki/Pseudo-Riemannian_manifold#App...&gt;, and the further astrophysically-driven demands of global hyperbolicity or at least reasonably strong causality conditions, no isometric embeddings, geodesic incompleteness, asymptotic flatness around sources, junctions in sufficiently flat space, and energy conditions.…</p><p><a href="https://hackerpaper.kaipfister.de/p/0801.0287/">Paper and discussion history</a>. A mention is not an endorsement.</p>hep-phhttps://news.ycombinator.com/item?id=2506678urn:hackerpapers:mention:0801.0287:2506678Mon, 02 May 2011 15:56:29 GMT<p>Hold on, where are you getting the CPT-symmetry violation from? This paper http://arxiv.org/abs/0801.0287v4 has a collection of experimental results hinting at that but the conclusion does not as yet seem to be very strong.</p><p><a href="https://hackerpaper.kaipfister.de/p/0801.0287/">Paper and discussion history</a>. A mention is not an endorsement.</p>hep-ph