Pith Number

pith:VRTVRULY

pith:2019:VRTVRULY54K7O4EPSMHCYMWHPF

not attested not anchored not stored refs pending

Unsupervised Feature Learning for Point Cloud by Contrasting and Clustering With Graph Convolutional Neural Network

Ling Zhang, Zhigang Zhu

arxiv:1904.12359 v3 · 2019-04-28 · cs.CV

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VRTVRULY54K7O4EPSMHCYMWHPF}

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	2026-07-04T23:55:11.080374Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac6758d178ef15f7708f930e2c32c77979dc860f4ab56788bc7fa6f3f88f391f

Aliases

arxiv: 1904.12359 · arxiv_version: 1904.12359v3 · doi: 10.48550/arxiv.1904.12359 · pith_short_12: VRTVRULY54K7 · pith_short_16: VRTVRULY54K7O4EP · pith_short_8: VRTVRULY

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/VRTVRULY54K7O4EPSMHCYMWHPF \
  | 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: ac6758d178ef15f7708f930e2c32c77979dc860f4ab56788bc7fa6f3f88f391f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ee2d20911ff962977d23763b1d9af0133539f42804da6c0fe133dc486022c9ee",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2019-04-28T18:21:13Z",
    "title_canon_sha256": "1de8b45d4310567516a22c39c7532ab57ce5076413334d83268bf9ce12f61247"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.12359",
    "kind": "arxiv",
    "version": 3
  }
}