sl-atlas is an interactive textbook for post-quantum lattice cryptography — and a working demonstration of the lab's research method. Every concept renders at three depths so the same material reaches a curious non-expert, a working programmer, and a formal researcher without any of them reading the others' version.

• Pick a depth. Press 1 Simple, 2 Developer, 3 Researcher, or c for side-by-side Compare. Move between concepts with j / k.
• Try the live demo. On Learning With Errors, click Noise off and watch a secure scheme collapse into linear algebra a calculator could solve. That single demonstration is the whole point of lattice cryptography in one toggle.
• The sidebar shows the method, not just the content. Foundations is what's published. Held by Teacher gate is what the lab's own editorial review refused to publish — click a BLOCKed concept to read the draft and the reason. The gate has teeth; you can see them.
• Every claim has a provenance chain. Each concept carries an evidence grade and citation IDs that resolve to CITATIONS.md. CI fails the build if any reference rots.

New here? The first-hour visitor path walks the whole lab in six steps. Or just start exploring — pick a concept from the sidebar.