Pith Number

pith:OQSTMQYJ

pith:2011:OQSTMQYJX4Z5JZFLKWI2UO5MYX

not attested not anchored not stored refs pending

Star-Free Languages are Church-Rosser Congruential

Manfred Kufleitner, Pascal Weil (LaBRI), Volker Diekert

arxiv:1111.4300 v1 · 2011-11-18 · cs.FL

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OQSTMQYJX4Z5JZFLKWI2UO5MYX}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T03:47:01.318718Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7425364309bf33d4e4ab5591aa3bacc5c6bc4df18e84aff2f09b2f3aba96bd6a

Aliases

arxiv: 1111.4300 · arxiv_version: 1111.4300v1 · doi: 10.48550/arxiv.1111.4300 · pith_short_12: OQSTMQYJX4Z5 · pith_short_16: OQSTMQYJX4Z5JZFL · pith_short_8: OQSTMQYJ

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/OQSTMQYJX4Z5JZFLKWI2UO5MYX \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 7425364309bf33d4e4ab5591aa3bacc5c6bc4df18e84aff2f09b2f3aba96bd6a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ba95bc5915caa73f4b6d279dbdb46bf853907ebcd04298cb8d40e04574978ae6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2011-11-18T08:37:57Z",
    "title_canon_sha256": "e4b42285e997c34c6b40673a62ba0f58cb7d0e6e187152966182b71835c4833e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1111.4300",
    "kind": "arxiv",
    "version": 1
  }
}