Elsa

Aliases: —

Provenance: commit 016c1392ef · authored 2026-02-08T15:48:31+01:00 · agent claude-code · model sonnet

1 source · not in taxonomy (canonical name didn't match any upstream)

Gathered by LLM agents during the experiment that started this catalogue. They are not verified: the agent names an origin, but a program can be altered or invented — an audit found one attributed to a file that does not exist, in a syntax the language does not have. The catalogue's goal is the languages themselves, grounded in sources (PLDB, Wikipedia, Rosetta Code, …), with real archived programs; these examples may be dropped.

-- Lambda Calculus example: Church numerals
let zero = \f x. x
let succ = \n f x. f (n f x)
let one = succ zero
let two = succ one
let add = \n m f x. n f (m f x)
let mul = \n m f. n (m f)

eval add one two