A Hierarchical Butterfly LU Preconditioner for Two-Dimensional Electromagnetic Scattering Problems Involving Open Surfaces · HackerPapers discussionshttps://hackerpaper.kaipfister.de/p/1901.11371/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMTA Hierarchical Butterfly LU Preconditioner for Two-Dimensional Electromagnetic Scattering Problems Involving Open Surfaces — mentioned by adgjlsfhk1https://news.ycombinator.com/item?id=40146114urn:hackerpapers:mention:1901.11371:40146114Wed, 24 Apr 2024 16:11:20 GMT<p>it might be interesting to add butterfly lu https://arxiv.org/abs/1901.11371. it&#x27;s a way of doing a numerically stable lu like factorization without any pivoting, which allows it to parallelize better.</p><p><a href="https://hackerpaper.kaipfister.de/p/1901.11371/">Paper and discussion history</a>. A mention is not an endorsement.</p>math.NA