Pith Number

pith:QXMZQGT2

pith:2020:QXMZQGT2GWGBEGDWRM6PIKZJXY

not attested not anchored not stored refs pending

Progressive Cluster Purification for Unsupervised Feature Learning

Chang Liu, Qixiang Ye, Weiping Wang, Wei Wang, Yifei Zhang, Yu Zhou

arxiv:2007.02577 v2 · 2020-07-06 · 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{QXMZQGT2GWGBEGDWRM6PIKZJXY}

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	2026-07-05T01:19:27.969654Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85d9981a7a358c1218768b3cf42b29be1519c481772810c36a1876fa4b5f9560

Aliases

arxiv: 2007.02577 · arxiv_version: 2007.02577v2 · doi: 10.48550/arxiv.2007.02577 · pith_short_12: QXMZQGT2GWGB · pith_short_16: QXMZQGT2GWGBEGDW · pith_short_8: QXMZQGT2

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/QXMZQGT2GWGBEGDWRM6PIKZJXY \
  | 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: 85d9981a7a358c1218768b3cf42b29be1519c481772810c36a1876fa4b5f9560

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6b576a5bdf8f768aebf8cf663388779e1f533eef870884747d93afa85e3d6ccc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2020-07-06T08:11:03Z",
    "title_canon_sha256": "4e3bb25692c58376bde6d9487dad13adef22d1035f60dde34eceb5c786ec6465"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2007.02577",
    "kind": "arxiv",
    "version": 2
  }
}