4.4M views · Jul 11, 2025 · 8:58 · 0 HN recommenders · 3 mentions · discussed 2025–2026
A short explainer from 2swap on the chaotic behavior of double pendulums. It examines how predictable the system is for some starting conditions and whether closed-form solutions exist.
Why Hacker News points people here: Cited as a related video when threads touch on chaos, predictability and fractals from pendulum state spaces.
“here's a relevant video about the (sometimes not) chaotic nature of double pendulums”HN comment, 2025
“You can make a fractal out of the state graph of a double pendulum”
Fractal from double pendulum state graph.
You can make a fractal out of the state graph of a double pendulum: this video I don't doubt there could be an iterative formula that maps to it, but I'd be very surprised.
“here's a relevant video about the (sometimes not) chaotic nature of double pendulums”
Relevant to the chaotic nature of double pendulums.
As an aside, here's a relevant video about the (sometimes not) chaotic nature of double pendulums: this video
Chaos can be predictable over ranges of input.
Correct, it's akin to chaos theory or the butterfly effect, which, even it can be predictable for many ranges of input: this video
