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    Double Pendulums are Chaoticn't

    2swap

    3 HN mentions · mentioned in 3 months, 2025–2026

    YouTube

    8:58 · 4.4M views · Jul 11, 2025

    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.

    Cited as a related video when threads touch on chaos, predictability and fractals from pendulum state spaces.

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    3 comments from Hacker News

    1. @badosuJul 2025· in “Show HN: Beyond Z²+C, Plot Any Fractal”

      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.

      CitesView on HN
    2. @satvikpendemApr 2026· in “Claude mixes up who said what and that's not OK”

      Correct, it's akin to chaos theory or the butterfly effect, which, even it can be predictable for many ranges of input: this video

      CitesView on HN
    3. @EMIRELADEROSep 2025· in “What Is the Fourier Transform?”

      As an aside, here's a relevant video about the (sometimes not) chaotic nature of double pendulums: this video

      CitesView on HN