A living archive of elegant mathematics

Proofs worth
keeping.

Clear arguments, chosen for the idea that makes them stay with you. Every folio includes the proof, its intuition, and two worked examples.

Enter the archive How it is curated

A small turn can reveal the whole argument.

01 / A place to begin

Selected folios

Browse all proofs

02 / A map of ideas

Every subject opens into its own collection.

The living ledger / 20 Oct 2026

This setting adds 8 proofs, numbered 33 to 40, from prime reciprocals and graph parity to completeness and the geometry of a square.