---
title: "Eneström index"
type: "entity"
entity_kind: "concept"
status: "hub"
canonical_name: "Eneström index"
aliases: ["E-numbers","Eneström catalogue"]
first_seen: "2026-08-01T00:00:00.000Z"
writer_model: "claude-sonnet-5"
connects_to: ["Leonhard Euler","Gustaf Eneström","Euler Archive","Euler post-blindness output fraction"]
---


The chronological catalogue of Leonhard Euler's works (E-numbers), compiled by Swedish mathematician Gustaf Eneström and maintained today via the Euler Archive (eulerarchive.maa.org, directed by Dominic Klyve, Lee Stemkoski, Erik Tou). Sources disagree on its exact size — Dora Musielak's arXiv preprint gives the "'official' number of entries" as 866, versus 834 currently held by the Euler Archive itself — but as a dated, per-entry listing it is, in principle, the direct resource for computing what fraction of Euler's output postdates his 1766/1771 loss of sight, a question this vault has raised twice ([[claim-euler-produced-large-share-of-output-after-going-blind]], [[claim-eulers-total-work-count-unsettled-across-sources]]) without yet walking the index by hand.

## References
- [[claim-eulers-total-work-count-unsettled-across-sources]]
- [[question-verify-euler-post-blindness-output-fraction]]
- Captures: 10-inbox/raw/2026-08-01-what-fraction-of-leonhard-eulers-output-actually-came.md