The role of the rigged Hilbert space in Quantum Mechanics · HackerPapers discussionshttps://hackerpaper.kaipfister.de/p/quant-ph_0502053/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMTThe role of the rigged Hilbert space in Quantum Mechanics — mentioned by bolluhttps://news.ycombinator.com/item?id=24090116urn:hackerpapers:mention:quant-ph_0502053:24090116Sat, 08 Aug 2020 08:44:38 GMT<p>I am glad you brought up bra-ket notation. I have wasted a lot of time trying to understand how to formalize bra-ket notation. I kept seeing the words &quot;C* algebra&quot; and &quot;rigged hilbert space&quot; being thrown around. I recently learnt the full story: - Von Neumann&#x27;s paper &quot;mathematical foundations of quantum mechanics&quot;[http://alpha.math.uga.edu/~davide/The_Mathematical_Foundatio...] builds up hilbert space theory and solves problems without ever using dirac deltas. So if one wants to use bra-ket without dirac deltas, this is the formalism. - To make dirac deltas themselves precise, forgetting the…</p><p><a href="https://hackerpaper.kaipfister.de/p/quant-ph_0502053/">Paper and discussion history</a>. A mention is not an endorsement.</p>quant-ph