Pith Number

pith:H2TSOZAF

pith:2021:H2TSOZAFXZRF5MOYECIIXSHG7Z

not attested not anchored not stored refs pending

Self-supervised Product Quantization for Deep Unsupervised Image Retrieval

Nam Ik Cho, Young Kyun Jang

arxiv:2109.02244 v2 · 2021-09-06 · 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{H2TSOZAFXZRF5MOYECIIXSHG7Z}

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	2026-07-05T03:47:53.860116Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3ea7276405be625eb1d820908bc8e6fe4baae4268192b0d7e7c76cb77abf566f

Aliases

arxiv: 2109.02244 · arxiv_version: 2109.02244v2 · doi: 10.48550/arxiv.2109.02244 · pith_short_12: H2TSOZAFXZRF · pith_short_16: H2TSOZAFXZRF5MOY · pith_short_8: H2TSOZAF

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/H2TSOZAFXZRF5MOYECIIXSHG7Z \
  | 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: 3ea7276405be625eb1d820908bc8e6fe4baae4268192b0d7e7c76cb77abf566f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "78219eb3bd7634dd59a931fae40ab14a4efe53b5b8fa61a24c0f057f6a5e7186",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2021-09-06T05:02:34Z",
    "title_canon_sha256": "62fce60e472b1ebce4d650200ec34ad4b6adc3c3cf67e1a85da99f442279ff1c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.02244",
    "kind": "arxiv",
    "version": 2
  }
}