Pith Number

pith:UPQDV2VN

pith:2019:UPQDV2VNSRQK2ANCXGRMXWNBIH

not attested not anchored not stored refs pending

Prototype Propagation Networks (PPN) for Weakly-supervised Few-shot Learning on Category Graph

Chengqi Zhang, Guodong Long, Jing Jiang, Lina Yao, Lu Liu, Tianyi Zhou

arxiv:1905.04042 v2 · 2019-05-10 · cs.LG · cs.CV · cs.NE · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UPQDV2VNSRQK2ANCXGRMXWNBIH}

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	2026-05-17T23:44:28.581878Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3e03aeaad9460ad01a2b9a2cbd9a141c2b13bdd542709280e631074a35f9393

Aliases

arxiv: 1905.04042 · arxiv_version: 1905.04042v2 · doi: 10.48550/arxiv.1905.04042 · pith_short_12: UPQDV2VNSRQK · pith_short_16: UPQDV2VNSRQK2ANC · pith_short_8: UPQDV2VN

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/UPQDV2VNSRQK2ANCXGRMXWNBIH \
  | 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: a3e03aeaad9460ad01a2b9a2cbd9a141c2b13bdd542709280e631074a35f9393

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0cd2a96dab8096f111c071bc8a1ef4f975f3fa823a95881cd69c6fd8824fd5b2",
    "cross_cats_sorted": [
      "cs.CV",
      "cs.NE",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2019-05-10T09:57:23Z",
    "title_canon_sha256": "a268fd57515997adce209cff0f4f4216c242bd149e64bcd4b932000b03b77425"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.04042",
    "kind": "arxiv",
    "version": 2
  }
}