Pith Number

pith:POCG37O7

pith:2021:POCG37O7L55R4NJQ7RHPZBJAQC

not attested not anchored not stored refs pending

Language Invariant Properties in Natural Language Processing

Debora Nozza, Dirk Hovy, Federico Bianchi

arxiv:2109.13037 v2 · 2021-09-27 · 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{POCG37O7L55R4NJQ7RHPZBJAQC}

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	2026-07-05T03:19:23.977764Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7b846dfddf5f7b1e3530fc4efc85208095a67cb49d989a287315f3b463690b06

Aliases

arxiv: 2109.13037 · arxiv_version: 2109.13037v2 · doi: 10.48550/arxiv.2109.13037 · pith_short_12: POCG37O7L55R · pith_short_16: POCG37O7L55R4NJQ · pith_short_8: POCG37O7

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/POCG37O7L55R4NJQ7RHPZBJAQC \
  | 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: 7b846dfddf5f7b1e3530fc4efc85208095a67cb49d989a287315f3b463690b06

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cb6c890bacc3f0e027003d4ed1646836b118f52be488b9056db5c3156dbd474e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2021-09-27T13:23:05Z",
    "title_canon_sha256": "2a7ab2a4e83d5bc45133e32c2b8e42eb84725e76e73b6966b3e46731e4584999"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.13037",
    "kind": "arxiv",
    "version": 2
  }
}