A great story from nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpqcwuf66kqp6mj8ep3j55eegx9taljuykk0hjkghu0rnvt3rtvdu7qx0l42a (nprofile…l42a) about the 50-year effort to understand the physics and mathematics of the Hofstadter Butterfly.
https://www.quantamagazine.org/ten-martini-proof-uses-number-theory-to-explain-quantum-fractals-20250825/