Pith Number

pith:IITHWZL7

pith:2020:IITHWZL73WRGQNZ2G7LY2WA5DL

not attested not anchored not stored refs pending

Keyphrase Extraction with Span-based Feature Representations

Funan Mu, Jing Tang, Lifeng Wang, Liqun Liu, Qingyu Yin, Teng Ma, Xing Zhou, Yequan Wang, Yibo Sun, Zhenting Yu

arxiv:2002.05407 v1 · 2020-02-13 · 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{IITHWZL73WRGQNZ2G7LY2WA5DL}

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	2026-07-05T00:40:30.972280Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

42267b657fdda268373a37d78d581d1ac3a9b365055cd06aedf4b351b549861e

Aliases

arxiv: 2002.05407 · arxiv_version: 2002.05407v1 · doi: 10.48550/arxiv.2002.05407 · pith_short_12: IITHWZL73WRG · pith_short_16: IITHWZL73WRGQNZ2 · pith_short_8: IITHWZL7

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/IITHWZL73WRGQNZ2G7LY2WA5DL \
  | 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: 42267b657fdda268373a37d78d581d1ac3a9b365055cd06aedf4b351b549861e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1b8b9f5f5bda436dff2919070cf733e31f1a649b8e69871d80c53c974bb4b36f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2020-02-13T09:48:31Z",
    "title_canon_sha256": "d75f0599450b623a496058f25e63ec805379bd04ff728a4c1ac996b44e93aaae"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2002.05407",
    "kind": "arxiv",
    "version": 1
  }
}