Life & fun · November 11, 2023
Generate pdf with gitbook or mdbook url
In plain words
This tool converts GitBook or mdBook URLs into PDF documents. It's designed for anyone who needs to save or share online documentation in PDF format, making it useful for developers, technical writers, and students who want offline access to their materials. The tool streamlines the process of downloading web-based documentation as portable files without manual conversion steps.
written from the facts on this page · September 2026
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Scroll through all 43,252,003,274,489,856,000 reachable Rubik's Cube permutations.
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Hi HN, I built Eigendrum, a web tool that solves the 2D wave equation for arbitrary shapes so you can hear what they sound like as drums. How it works: * Solves -∇²u = λu using finite element analysis (Kφ = λMφ) on a triangle mesh. * Validated to <0.1% error against closed-form solutions for circles (Bessel zeros) and rectangles. * Sound model factors in strike location, Rayleigh damping, and mallet width. * Includes Kac drums I & II to demonstrate identical sound spectra from different geometries. * No frameworks, build steps, or dependencies. Repo and tests:…
Life & fun · 27d ago · baselashraf81.github.io
Launched alongside, November 2023
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