Pith Number

pith:PVAW6JA2

pith:2013:PVAW6JA2CD7LNJ6PAL2RN3HYO3

not attested not anchored not stored refs pending

Separating regular languages by piecewise testable and unambiguous languages

Lorijn van Rooijen, Marc Zeitoun, Thomas Place

arxiv:1304.6734 v1 · 2013-04-24 · 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{PVAW6JA2CD7LNJ6PAL2RN3HYO3}

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	2026-05-18T03:27:11.985887Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7d416f241a10feb6a7cf02f516ecf876e8f3275bea090c958d6472269d35af5e

Aliases

arxiv: 1304.6734 · arxiv_version: 1304.6734v1 · doi: 10.48550/arxiv.1304.6734 · pith_short_12: PVAW6JA2CD7L · pith_short_16: PVAW6JA2CD7LNJ6P · pith_short_8: PVAW6JA2

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/PVAW6JA2CD7LNJ6PAL2RN3HYO3 \
  | 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: 7d416f241a10feb6a7cf02f516ecf876e8f3275bea090c958d6472269d35af5e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "28c21ac150d2173135d521df91f93d1d495965d04f6a704e2d2958f3fe771a35",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2013-04-24T20:09:39Z",
    "title_canon_sha256": "61fa73be4a9e8632d1eaf7660f7c0ce50561c396ab3b814a38ac250dcbd6c9fc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.6734",
    "kind": "arxiv",
    "version": 1
  }
}