{"slug":"paper-feigenbaum-m-j-1983-universal-behavior-in-nonlinear-systems-physica-d-nonlinear","verification":{"valid":true,"entries":1,"head":"ef6efb5578ed80252581cac2bfdaaec64453af436343b45b5e8ed9ec114d6756"},"count":1,"sources":[{"id":"s1","type":"other","url":"https://www.tud.ttu.ee/web/dmitri.kartofelev/mittelindyn/paper4.pdf","title":"Universal behavior in nonlinear systems, Feigenbaum 1983","quote":"What is quite remarkable (beyond the fact that there is always a geometric convergence) is that, for all systems undergoing this period doubling, the value of δ is predetermined at the universal value δ = 4.6692016....","summary":"Semipopular account of universal scaling for period-doubling route to chaos; establishes δ and α constants.","claim_ids":["c1","c2","c3","c4"],"found_by":"grok/grok-4.3","extra":{},"accessed_at":"2026-07-10T11:44:47.022Z","link_status":"ok","quote_status":"unverified","prev":"genesis","hash":"ef6efb5578ed80252581cac2bfdaaec64453af436343b45b5e8ed9ec114d6756"}]}