Pith Number

pith:UVPKZ3MA

pith:2020:UVPKZ3MA7T5DX6R7MVTOBKAXBW

not attested not anchored not stored refs pending

Self-Training for Unsupervised Parsing with PRPN

Anhad Mohananey, Katharina Kann, Samuel R. Bowman

arxiv:2005.13455 v1 · 2020-05-27 · 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{UVPKZ3MA7T5DX6R7MVTOBKAXBW}

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	2026-07-05T01:06:15.983390Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a55eaced80fcfa3bfa3f6566e0a8170db8b9a593d90e05752baef8f739dd33ac

Aliases

arxiv: 2005.13455 · arxiv_version: 2005.13455v1 · doi: 10.48550/arxiv.2005.13455 · pith_short_12: UVPKZ3MA7T5D · pith_short_16: UVPKZ3MA7T5DX6R7 · pith_short_8: UVPKZ3MA

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/UVPKZ3MA7T5DX6R7MVTOBKAXBW \
  | 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: a55eaced80fcfa3bfa3f6566e0a8170db8b9a593d90e05752baef8f739dd33ac

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "95cbcc76cf6897b3e7ef1563a4663c91444e5588a8f1b8939cc42d14f3d292fe",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2020-05-27T16:11:09Z",
    "title_canon_sha256": "0cbd486d96d0f377a17d2cdb456367618ef79fd65ec71f7ef76bbd19697d0ef4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2005.13455",
    "kind": "arxiv",
    "version": 1
  }
}