Dev tools · September 26, 2025
A little notebook for learning linear algebra with Python
A little notebook for learning linear algebra with Python launched on September 26, 2025 with 190 votes, #160 of 8,160 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
A little notebook for learning linear algebra with Python is an educational resource designed for students and developers who want to understand linear algebra concepts through hands-on Python coding. The notebook combines theoretical explanations with practical examples, allowing learners to explore mathematical concepts interactively. It serves as a self-paced learning tool that bridges the gap between abstract mathematics and real-world programming applications, making linear algebra more accessible to those with programming experience.
written from the facts on this page · September 2026
From the sources
Let’s get our hands dirty! This lab is about playing with the building blocks of linear algebra: scalars and vectors. Think of a scalar as just a plain number, like 3 or -1.5 . A vector is a small list of numbers, which you can picture as an arrow in space. We’ll use Python (with NumPy) to explore them. Don’t worry if this is your first time with NumPy - we’ll go slowly. import numpy as np That’s it - we’re ready! NumPy is the main tool we’ll use for linear algebra. a = 5 # a scalar b = - 2.5 # another scalar print (a + b) # add them print (a * b) # multiply them 2.5 -12.5 Vectors are lists of numbers. v = np.array([ 2 , 3 ]) # a vector in 2D w = np.array([ 1 , - 1 , 4 ]) # a vector in 3D…from little-book-of.github.io
Does a similar job
all alternatives →- EMExploring Mathematics with PythonDec 2025 · coe.psu.ac.th · ▲268
Intuitive Linear Algebra and 3D Geometry2018 · intuitive-math.club · ▲402Intuitive Math Descriptions

Jupyter4kids – Notebooks to help teach kids principles of programming2017 · github.com · ▲147Learning numerical computing with notebooks for all ages. - eka-foundation/numerical-computing-is-fun

Natural Language Processing Demystified (Part One)2022 · nlpdemystified.org · ▲166Hi HN: I published part one of my free NLP course. The course is intended to help anyone who knows Python and a bit of math go from the very basics all the way to today's mainstream models and frameworks. I strive to balance theory and practice and so every module consists of detailed explanations and slides along with a Colab notebook (in most modules) putting the theory into practice. In part one, we cover text preprocessing, how to turn text into numbers, and multiple ways to classify and search text using "classical" approaches. And along the way, we'll pick up useful bits on how to use…
More dev tools this month
the category →

open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.
Dev tools · 27d ago · github.com

Contribute to reladraw/reladraw development by creating an account on GitHub.
Dev tools · 25d ago · github.com
OpenBot▲362Grok Bot alternative: free, local, open-source, multiplayer
Dev tools · 22d ago · openbot.run
Talanoa▲340Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…
Dev tools · 20d ago · talanoa.email
CoreSpeed▲332One MCP for everything your agents need: apps, memory, tools
Dev tools · 27d ago · corespeed.io
Source: Show HN post ↗
Launched alongside, September 2025
the whole month →

The site hit #1 on HN about a year ago. Got enough traffic that I turned it into a proper API. What's there: - REST API — 35k products, manually filterable by category, free key, 60 req/min - CLI — npx anycrap random -c food - faker.js plugin — bundled, no API call, works offline - HuggingFace dataset — full 35k rows for ML/training https://anycrap.shop/developers
AI · 2025 · anycrap.shop

I made a built-from scratch Wayland Compositor to display any GUI app* in the terminal! I think there is a lot of unexplored potential in custom Wayland compositors, a lot of really cool things you can embed existing applications into! So, I started with embedding apps into the terminal because that is the easiest input/output (output is just utf-8 and I use the great `chafa` library for that, and I just read from stdin for the input). If you have any other ideas for cool Wayland compositors, let me know. I purposedly wrote 80% the app in Typescript to appeal to the most developers and…
Dev tools · 2025 · github.com
- IR
Years ago I stumbled across a basic version of this concept and it stuck with me. I knew if I was ever going to take on such a project, it would need to be flawless, but without coding experience it was just another idea that would never happen. By the end of 2024, as AI coding tools exploded everywhere, I finally had a way to make it real. I started from zero knowledge and spent months collaborating with AI agents as a learning experience. Every pixel and every function went through me. The AI translated what I asked for into code, but every decision was human. I didn't use existing OS…
AI · 2025 · mitchivin.com

