# Building a Quine Using Kleene's Second Recursion Theorem

A Hacker News-linked post walks through constructing a quine — a program that outputs its own source code — using Kleene's second recursion theorem from computability theory. It shows how an abstract fixed-point result translates into concrete self-referential code, making the theorem tangible for programmers.

**Importance:** 2/5

## Sources

### Technology
- [Hacker News](https://emarzion.github.io/KSRT/) — Sat, 31 Oct 2026 23:55:21 +0000