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<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>The orientability of spacetime · HackerPapers discussions</title><link>https://hackerpaper.kaipfister.de/p/gr-qc_0202031/</link><description>Collected HN comments and submissions linking this paper.</description><language>en</language><lastBuildDate>Mon, 02 Nov 2026 11:16:22 GMT</lastBuildDate><atom:link href="https://hackerpaper.kaipfister.de/p/gr-qc_0202031/feed.xml" rel="self" type="application/rss+xml" /><item><title>The orientability of spacetime — mentioned by monster_truck</title><link>https://news.ycombinator.com/item?id=45650856</link><guid isPermaLink="false">urn:hackerpapers:mention:gr-qc_0202031:45650856</guid><pubDate>Mon, 20 Oct 2025 23:51:15 GMT</pubDate><description>&lt;p&gt;Think of it more like &amp;quot;IRL raytracing&amp;quot;, where a ray (the beam) is cast and the result for a single pixel from the point of view is captured, and then it is repeated millions of times. Even if you had a clock and camera for every pixel, the sync is dependent on the path of the signal taken. Even if you sent a signal along every possible route and had a clock for each route for each pixel (a dizzingly large number) it still isn&amp;#x27;t clear that this would represent a single inertial frame. As I understand it even if you used quantum entanglement for sync, the path of the measurement would still be…&lt;/p&gt;&lt;p&gt;&lt;a href="https://hackerpaper.kaipfister.de/p/gr-qc_0202031/"&gt;Paper and discussion history&lt;/a&gt;. A mention is not an endorsement.&lt;/p&gt;</description><category>gr-qc</category></item></channel></rss>
