Covariant action for bouncing cosmologies in modified Gauss-Bonnet gravity · HackerPapers discussionshttps://hackerpaper.kaipfister.de/p/1904.00260/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMTCovariant action for bouncing cosmologies in modified Gauss-Bonnet gravity — mentioned by raattgifthttps://news.ycombinator.com/item?id=39563181urn:hackerpapers:mention:1904.00260:39563181Fri, 01 Mar 2024 16:14:49 GMT<p>Applications of (generalizations of the Chern-) Gauss-Bonnet theorem came up in the context of alternatives to General Relativity around fifteen to twenty years ago. You should probably stop reading here. :-) https://en.wikipedia.org/wiki/Chern%E2%80%93Gauss%E2%80%93Bo... (the History section is pretty interesting) https://en.wikipedia.org/wiki/Gauss%E2%80%93Bonnet_gravity As briefly touched on there, Einstein-Gauss-Bonnet (EGB) gravity turned out to require higher dimensions (the start of this abstract is worth the click :-) &lt;https://link.springer.com/article/10.1140/epjc/s10052-020-82...&gt; )…</p><p><a href="https://hackerpaper.kaipfister.de/p/1904.00260/">Paper and discussion history</a>. A mention is not an endorsement.</p>gr-qc