awesome-self-reference

A painting by René Magritte

A painting by Norman Rockwell

A formal technique of placing a copy of an image within itself

The effect of a picture recursively appearing within itself, in a place where a similar picture would realistically be expected to appear

A sentence that describes itself in the sense of providing an inventory of its own characters

A rule of language or linguistic style, humorously written in such a way that it breaks this rule

An acronym that refers to itself

This sentence is false

Does the set of all those sets that do not contain themselves contain itself?

The unique number whose digits equal its continued fraction coefficients

A number that is its own prime factorization, that is 13532385396179 = 13 × 53² × 3853 × 96179

A formula that visually represents itself when graphed at a specific location in the (x, y) plane

Conway's Game of Life running inside Conway's Game of Life using OTCA metapixels

A computer program that takes no input and produces a copy of its own source code as its only output

An Ouroboros Quine

A Ruby program that generates Rust program that generates Scala program that generates (through 128 languages in total) REXX program that generates the original Ruby code again

A radiation hardened quine

A Ruby quine that remains a quine after any one of the characters in its source code is removed

quinesnake

A quine that plays snake over its own source

A Ruby quine with an ASCII image of a globe in its source code that rotates by 45 degrees after each run, eventually coming around after eight runs

A truly naked, brutalist html quine

A PNG image of the ouroboros that displays its own MD5 hash

An interpreter that defines each feature of the interpreted language using a similar facility of the interpreter's host language

A Micro-Manual for LISP - Not the whole truth

The LISP interpreter written in LISP

A higher-order function fix that, for any function f that has an attractive fixed point, returns a fixed point x of that function

A Turing machine that can simulate an arbitrary Turing machine on arbitrary input

A technique for producing a self-compiling compiler - that is, compiler (or assembler) written in the source programming language that it intends to compile

Manual pager man page (accessed using )

An article about Wikipedia on Wikipedia

Snapshots of The Internet Archive stored in The Internet Archive

A tweet that quote tweets itself

Awesome Self-Reference

A curated list of examples of self-reference in art, science, and technology, which includes itself

"It always takes longer than you expect, even when you take into account Hofstadter's Law"

The world's largest model railway in Hamburg, Germany has a model of itself in its model of Hamburg

The village where Untitled Goose Game takes place contains a small model version of itself, and also a tiny version of the model inside that