Pith Number

pith:CPY3HDPB

pith:2019:CPY3HDPBBCDVBZNPZVIPARFUGT

not attested not anchored not stored refs pending

ScienceExamCER: A High-Density Fine-Grained Science-Domain Corpus for Common Entity Recognition

Hannah Smith, John Culnan, Peter Jansen, Zeyu Zhang

arxiv:1911.10436 v1 · 2019-11-24 · 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{CPY3HDPBBCDVBZNPZVIPARFUGT}

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	2026-07-05T00:21:40.191333Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

13f1b38de1088750e5afcd50f044b434da57423ad6cdfa2c07f0ad2f8d824da2

Aliases

arxiv: 1911.10436 · arxiv_version: 1911.10436v1 · doi: 10.48550/arxiv.1911.10436 · pith_short_12: CPY3HDPBBCDV · pith_short_16: CPY3HDPBBCDVBZNP · pith_short_8: CPY3HDPB

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/CPY3HDPBBCDVBZNPZVIPARFUGT \
  | 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: 13f1b38de1088750e5afcd50f044b434da57423ad6cdfa2c07f0ad2f8d824da2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "949de28b732a04df495eac1dffe69e4410b0e4fc4af294701bdadebdac25a9b2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2019-11-24T00:08:09Z",
    "title_canon_sha256": "17f5e753229d0a4dd8336ee6b2866f3f050dbd12e4ad78a05ea289a5ed489bd1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1911.10436",
    "kind": "arxiv",
    "version": 1
  }
}