Pith Number

pith:PH7NVQAM

pith:2021:PH7NVQAMRXIK2CFRKMBHQGERGW

not attested not anchored not stored refs pending

Instance Similarity Learning for Unsupervised Feature Representation

Jie Zhou, Jiwen Lu, Yunsong Wang, Ziwei Wang, Ziyi Wu

arxiv:2108.02721 v1 · 2021-08-05 · 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{PH7NVQAMRXIK2CFRKMBHQGERGW}

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	2026-07-05T03:03:35.716883Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

79fedac00c8dd0ad08b15302781891359d12b9e1445314f4fa5e201d2dd732e5

Aliases

arxiv: 2108.02721 · arxiv_version: 2108.02721v1 · doi: 10.48550/arxiv.2108.02721 · pith_short_12: PH7NVQAMRXIK · pith_short_16: PH7NVQAMRXIK2CFR · pith_short_8: PH7NVQAM

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/PH7NVQAMRXIK2CFRKMBHQGERGW \
  | 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: 79fedac00c8dd0ad08b15302781891359d12b9e1445314f4fa5e201d2dd732e5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bf37c66dadeeee48f45847eea5ac8c44dbed8c7e51b6af2673048958fd831b26",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2021-08-05T16:42:06Z",
    "title_canon_sha256": "07d649817135b95363680790773597661d5ed8c2075083320d797047825882c2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2108.02721",
    "kind": "arxiv",
    "version": 1
  }
}