Pith Number

pith:4N3KTN4R

pith:2018:4N3KTN4RJB2OLHPDO745GTQE63

not attested not anchored not stored refs pending

Generalized chart constraints for efficient PCFG and TAG parsing

Alexander Koller, Sophie Henning, Stefan Gr\"unewald

arxiv:1806.10654 v1 · 2018-06-27 · cs.CL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4N3KTN4RJB2OLHPDO745GTQE63}

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	2026-05-18T00:12:08.336432Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e376a9b7914874e59de377f9d34e04f6f0aff70d095d574938b1d89330cf786c

Aliases

arxiv: 1806.10654 · arxiv_version: 1806.10654v1 · doi: 10.48550/arxiv.1806.10654 · pith_short_12: 4N3KTN4RJB2O · pith_short_16: 4N3KTN4RJB2OLHPD · pith_short_8: 4N3KTN4R

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/4N3KTN4RJB2OLHPDO745GTQE63 \
  | 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: e376a9b7914874e59de377f9d34e04f6f0aff70d095d574938b1d89330cf786c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f03cb1c7d3c391ecc90b624edd4af3c59a5618a6825a1f3290fe6e00eea5e7df",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2018-06-27T19:36:05Z",
    "title_canon_sha256": "6fa24a3340a48de275269da4162d60412e6ab5b38c868f5ae3c04dd95f910a3d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.10654",
    "kind": "arxiv",
    "version": 1
  }
}