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Hi! I made a two-dimensional phase portrait plotter website page.

Purpose: If you don't have any study guide for exercises related to dynamic systems or too lazy to run python and set up sliders to visually see potential bifurcations, you can play around with said dynamic system (numerically) to visually get a feel of the system.

It includes numerical approximations for:

- Euler/4th Order Runge-Kutta solver for the system --> You can also pick initial point + backwards integration.

- Poincaré Index (index theory)

- Nullclines

- Eigenvalues of the Jacobian matrix (sometimes called "stability matrix" in the literature)

It's based on old python code that I made for a dynamic system course that I converted to JavaScript using Grok, Sonnet 4.5 and Gemini Pro.

Does not include:

- Bifurcation diagrams - can't make it without a computer algebra system (CAS), way above my skill level...

- Anything that isn't two-dimensional (for one dimension you can just use a regular calculator) - 3D got highly computational heavy fast (for a website so to speak). I'm keeping it simple since it is a practice tool to draw your own phase portraits yourself by hand (like most exams requires you to do).

For real applications, you need to either solve stuff analytically or use more advance tools. This is just for educational purposes and enjoyment.

Comments URL: https://news.ycombinator.com/item?id=47014425

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Article URL: https://blog.yossarian.net/2020/11/30/How-many-registers-does-an-x86-64-cpu-have

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Context: Earlier this week asked how engineers "step through" their own anxiety. 20+ comments with methods: externalizing, nervous system regulation, "next thought" hack, 4-mile walks.

Built a tool for the gap: 2am, 6 layers deep, can't access your toolkit. 10 Socratic messages, no login, no memory.

Not therapy. Not optimization. Just pattern recognition when you're stuck mid-loop.

Try it: https://thestillpoint.netlify.app/

Thanks to everyone who shared their actual practices.

Comments URL: https://news.ycombinator.com/item?id=47014398

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Article URL: https://c-daniele.github.io/en/posts/2026-02-14-intro-spec-driven-development/

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Article URL: https://www.mimiclaw.io/

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Article URL: https://www.npr.org/2026/02/14/nx-s1-5711441/ai-chatgpt-openai-love-betrayal-delusion-chatbot

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Article URL: https://arxiv.org/abs/2602.09982

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Article URL: https://github.com/ashishra0/news-curator

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Article URL: https://dconf.org/2025/slides/shah.pdf

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Article URL: https://www.nber.org/papers/w34777

Comments URL: https://news.ycombinator.com/item?id=47014087

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Article URL: https://www.reuters.com/business/media-telecom/ai-film-school-trains-next-generation-hollywood-moviemakers-2026-02-14/

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Article URL: https://www.wsj.com/politics/national-security/pentagon-used-anthropics-claude-in-maduro-venezuela-raid-583aff17

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Article URL: https://apnews.com/article/federal-law-impairment-detection-car-dui-062d40e885a0e32c6cad0ba70163aef8

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ever heard of it? Do you use it?

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Article URL: https://github.com/DatanoiseTV/meeting-assistant

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Article URL: https://www.youtube.com/watch?v=twm99YQiN8E

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Article URL: https://code.visualstudio.com/docs/copilot/agents/third-party-agents#_claude-agent-preview

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Article URL: https://dbg.re/posts/car-file-format/

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Article URL: https://twitter.com/meta_alchemist/status/2022614255426769129

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Hey folks, we at SigNoz have been working on something to make SigNoz deployment actually painless. Foundry takes care of all the deployment complexity – the configurations, tooling, everything needed to run SigNoz – so you can spend less time getting it up and running and more time actually using it. With just a single YAML config file and one command, you can have a fully operational SigNoz instance using Docker, Systemd, etc., across platforms or any cloud vendor. The concept: Like a metalworking foundry transforms raw materials into finished products, Foundry takes your config ("Castings"), forges it through deployment templates (the "Moldings"), and pours out a ready-to-run SigNoz instance.

Comments URL: https://news.ycombinator.com/item?id=47013998

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