Pith Number

pith:2CERYADN

pith:2019:2CERYADNJ75XIJUCEYHYWIHJPO

not attested not anchored not stored refs pending

Tetra-Tagging: Word-Synchronous Parsing with Linear-Time Inference

Dan Klein, Nikita Kitaev

arxiv:1904.09745 v2 · 2019-04-22 · 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{2CERYADNJ75XIJUCEYHYWIHJPO}

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	2026-07-05T01:13:52.874179Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d0891c006d4ffb742682260f8b20e97b8ef5faa70826e64a84a67eda16688716

Aliases

arxiv: 1904.09745 · arxiv_version: 1904.09745v2 · doi: 10.48550/arxiv.1904.09745 · pith_short_12: 2CERYADNJ75X · pith_short_16: 2CERYADNJ75XIJUC · pith_short_8: 2CERYADN

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/2CERYADNJ75XIJUCEYHYWIHJPO \
  | 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: d0891c006d4ffb742682260f8b20e97b8ef5faa70826e64a84a67eda16688716

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e0e3d9b73b10d005e5bab3fe00b6f748984318fa4e740be5c22133258ec2f596",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2019-04-22T06:57:43Z",
    "title_canon_sha256": "6842b25ce803fb5a8a819cde82da6c071302955a724b9ec644e4d26c7ef48853"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.09745",
    "kind": "arxiv",
    "version": 2
  }
}