Pith Number

pith:KPNIUMAJ

pith:2021:KPNIUMAJE5A7SPADV4YDSHX4Q4

not attested not anchored not stored refs pending

Learning Bounded Context-Free-Grammar via LSTM and the Transformer:Difference and Explanations

Hui Shi, Jishen Zhao, Sicun Gao, Xinyun Chen, Yuandong Tian

arxiv:2112.09174 v2 · 2021-12-16 · 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{KPNIUMAJE5A7SPADV4YDSHX4Q4}

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	2026-07-05T04:07:43.123126Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

53da8a30092741f93c03af30391efc8735dda9a2424333e0369343f75306b9ce

Aliases

arxiv: 2112.09174 · arxiv_version: 2112.09174v2 · doi: 10.48550/arxiv.2112.09174 · pith_short_12: KPNIUMAJE5A7 · pith_short_16: KPNIUMAJE5A7SPAD · pith_short_8: KPNIUMAJ

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/KPNIUMAJE5A7SPADV4YDSHX4Q4 \
  | 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: 53da8a30092741f93c03af30391efc8735dda9a2424333e0369343f75306b9ce

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2a5c41fe2916b5bcf2ed48a115e67a343717c20c682eb309e3d0f1d662234806",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2021-12-16T19:56:44Z",
    "title_canon_sha256": "c5f1d54080651e1e29d04f966719fc80e22d44815a293049358b4de4bd552de4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2112.09174",
    "kind": "arxiv",
    "version": 2
  }
}