Pith Number

pith:QQHTG5AJ

pith:2018:QQHTG5AJEFBZODQCGMSL7IJAJ7

not attested not anchored not stored refs pending

What's Going On in Neural Constituency Parsers? An Analysis

Dan Klein, David Gaddy, Mitchell Stern

arxiv:1804.07853 v1 · 2018-04-20 · 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{QQHTG5AJEFBZODQCGMSL7IJAJ7}

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	2026-05-18T00:17:52.590411Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

840f3374092143970e023324bfa1204fd98b3b11fffc7db7e46d234474e40358

Aliases

arxiv: 1804.07853 · arxiv_version: 1804.07853v1 · doi: 10.48550/arxiv.1804.07853 · pith_short_12: QQHTG5AJEFBZ · pith_short_16: QQHTG5AJEFBZODQC · pith_short_8: QQHTG5AJ

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/QQHTG5AJEFBZODQCGMSL7IJAJ7 \
  | 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: 840f3374092143970e023324bfa1204fd98b3b11fffc7db7e46d234474e40358

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "44bc48ce905cc0e557403b2f28dde7c7fe17331100d41ebbddd371ae7d5f4d65",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2018-04-20T23:00:11Z",
    "title_canon_sha256": "a504f36e35dd3e6c799bda48687f6481979d715cf05a757c0e54ac91d74013bd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.07853",
    "kind": "arxiv",
    "version": 1
  }
}