# A 13th-Century Enumeration Algorithm, Ignored for 700 Years

DevFeed: [A 13th-Century Enumeration Algorithm, Ignored for 700 Years](<https://devfeed.tech/articles/a-13th-century-enumeration-algorithm-ignored-for-700-years-37561.md>)

Original publisher: [Read original article](<https://blog.klipse.tech/aboulafia/2026/07/06/a-13th-century-enumeration-algorithm-ignored-for-700-years.html>)

Author: Yehonathan Sharvit

Published: 2026-07-06T07:00:00Z

Content type: article

Language: en

Sources: [Klipse](<https://devfeed.tech/sources/klipse.md>)

Topics: [Algorithm](<https://devfeed.tech/topics/algorithm.md>), [ordering](<https://devfeed.tech/topics/ordering.md>), [structure](<https://devfeed.tech/topics/structure.md>)

Tags: [aboulafia](<https://devfeed.tech/tags/aboulafia.md>), [algorithm](<https://devfeed.tech/tags/algorithm.md>), [kabbalah](<https://devfeed.tech/tags/kabbalah.md>), [math](<https://devfeed.tech/tags/math.md>), [order](<https://devfeed.tech/tags/order.md>), [ordering](<https://devfeed.tech/tags/ordering.md>), [permutations](<https://devfeed.tech/tags/permutations.md>)

## AI overview

The article examines a systematic method for enumerating permutations described by the 13th-century Kabbalist Abraham Aboulafia in his account of Tserouf. It explains rules for ordering three-letter permutations and a rotation-based method for extending the ordering to longer words.

## Source excerpt

Aboulafia's Tserouf - Part 1 of 4 Next: An elegant formulation, inspired by Bill Gates ->