Pith Number

pith:ZE3HOWJP

pith:2022:ZE3HOWJPNB3CUBIY3CRMZHY3YV

not attested not anchored not stored refs pending

Fast-R2D2: A Pretrained Recursive Neural Network based on Pruned CKY for Grammar Induction and Text Representation

Gerard de Melo, Haitao Mi, Liang Li, Xiang Hu

arxiv:2203.00281 v3 · 2022-03-01 · 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{ZE3HOWJPNB3CUBIY3CRMZHY3YV}

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	2026-07-05T05:12:27.703810Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c93677592f68762a0518d8a2cc9f1bc570e0812bdc32fefeb70349a9f26c53b1

Aliases

arxiv: 2203.00281 · arxiv_version: 2203.00281v3 · doi: 10.48550/arxiv.2203.00281 · pith_short_12: ZE3HOWJPNB3C · pith_short_16: ZE3HOWJPNB3CUBIY · pith_short_8: ZE3HOWJP

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/ZE3HOWJPNB3CUBIY3CRMZHY3YV \
  | 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: c93677592f68762a0518d8a2cc9f1bc570e0812bdc32fefeb70349a9f26c53b1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "684f6dfd635a4ce2fe06b18ce30e80c4f40ab44b25ab56b44ef160d2efaa1c13",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2022-03-01T07:54:44Z",
    "title_canon_sha256": "7a39002f62118ec38b6ab889f2472a2c289747919025e5a8d2676c25690d66b5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2203.00281",
    "kind": "arxiv",
    "version": 3
  }
}