Pith Number

pith:QHLFUCDG

pith:2013:QHLFUCDGG5AOLO457CBNQSVPCA

not attested not anchored not stored refs pending

The risks of mixing dependency lengths from sequences of different length

Haitao Liu, Ramon Ferrer-i-Cancho

arxiv:1304.3841 v2 · 2013-04-13 · cs.CL · physics.data-an

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QHLFUCDGG5AOLO457CBNQSVPCA}

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

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	2026-05-18T02:32:22.680632Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

81d65a08663740e5bb9df882d84aaf103e153dae14211fc0db39c6294a5b6d89

Aliases

arxiv: 1304.3841 · arxiv_version: 1304.3841v2 · doi: 10.48550/arxiv.1304.3841 · pith_short_12: QHLFUCDGG5AO · pith_short_16: QHLFUCDGG5AOLO45 · pith_short_8: QHLFUCDG

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/QHLFUCDGG5AOLO457CBNQSVPCA \
  | 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: 81d65a08663740e5bb9df882d84aaf103e153dae14211fc0db39c6294a5b6d89

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2bcf8fcaa86073df1e0b1102f86398b85b91a3d5ff8cd745f13e4f3fe2b06861",
    "cross_cats_sorted": [
      "physics.data-an"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2013-04-13T20:19:50Z",
    "title_canon_sha256": "758ad8d1553c3d997f85b694b45920cb0c1c7d170d3387adc0d7050ff6c43c45"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.3841",
    "kind": "arxiv",
    "version": 2
  }
}