Double Pendulums are Chaoticn't

2swap · 4.4M views · 2025-07-11 · 8:58

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Overview

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.

On Hacker News

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

Discussed on HN; no positive recommendation is recorded in this export · HN mentions 2025–2026

Topics

Fundamental physics Recreational & visual math

What people said

satvikpendem · 2026-04 · Reference
Correct, it's akin to chaos theory or the butterfly effect, which, even it can be predictable for many ranges of input: [VIDEO]
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EMIRELADERO · 2025-09 · Reference
As an aside, here's a relevant video about the (sometimes not) chaotic nature of double pendulums: [VIDEO]
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badosu · 2025-07 · Reference
You can make a fractal out of the state graph of a double pendulum: [VIDEO] I don't doubt there could be an iterative formula that maps to it, but I'd be very surprised.
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Sources

Video by 2swap, played through YouTube.

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Data and selection notes

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