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Double Pendulums are Chaoticn't

Name: Double Pendulums are Chaoticn't
Description: 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.

2swap

3 videos recommended on HN

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Cited on HN 3 times, 2025–2026, never outright recommended score 0

Years with an HN recommendation, 2007–2026

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

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.

“here's a relevant video about the (sometimes not) chaotic nature of double pendulums” (HN, 2025)

3 citations · Explainers

Fundamental physics Recreational & visual math Explainers Physics, Space & Chemistry

3 Hacker News comments

From the HN archive; up to 20 kept per video, favoring different commenters. Recommendations first.

@badosu Jul 2025 Cites it

on HN thread 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.

Fractal from double pendulum state graph.

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@EMIRELADERO Sep 2025 Cites it

on HN thread What Is the Fourier Transform?

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

Relevant to the chaotic nature of double pendulums.

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@satvikpendem Apr 2026 Cites it

on HN thread 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]

Chaos can be predictable over ranges of input.

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