Pith Number

pith:LQNPI27G

pith:2021:LQNPI27GNXYHJD57LMYHPQWLCI

not attested not anchored not stored refs pending

A Compositional Feature Embedding and Similarity Metric for Ultra-Fine-Grained Visual Categorization

Miaohua Zhang, Xiaohan Yu, Yajie Sun, Yi Liao, Yongsheng Gao

arxiv:2109.12380 v3 · 2021-09-25 · 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{LQNPI27GNXYHJD57LMYHPQWLCI}

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	2026-07-05T03:26:20.514345Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5c1af46be66df0748fbf5b3077c2cb122938f1bb89c72b1c018e2217d48b27c7

Aliases

arxiv: 2109.12380 · arxiv_version: 2109.12380v3 · doi: 10.48550/arxiv.2109.12380 · pith_short_12: LQNPI27GNXYH · pith_short_16: LQNPI27GNXYHJD57 · pith_short_8: LQNPI27G

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/LQNPI27GNXYHJD57LMYHPQWLCI \
  | 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: 5c1af46be66df0748fbf5b3077c2cb122938f1bb89c72b1c018e2217d48b27c7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2dc89d684093466e24c48f25cc8d81be3c1ed9118cfa8bc0de41363d3636fd35",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2021-09-25T15:05:25Z",
    "title_canon_sha256": "fa07a11cb96f3068a30b9212c8204a68d730023b30eff662c2fc0fcb83b21728"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.12380",
    "kind": "arxiv",
    "version": 3
  }
}