Pith Number

pith:FJ52CZB2

pith:2012:FJ52CZB2ZUOK2OLQP2PFWQVXRB

not attested not anchored not stored refs pending

The Evolution and Star Formation History of M33

Fenghui Zhang, Jinliang Hou, Jun Yin, Ruixiang Chang, Xiaoyu Kang, Yu Zhang, Zhanwen Han

arxiv:1207.5280 v1 · 2012-07-23 · astro-ph.CO · astro-ph.GA

Open paper page JSON What is a Pith Number?

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

Receipt and verification

First computed	2026-05-18T01:56:15.156469Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2a7ba1643acd1cad39707e9e5b42b7886c6aec8704a91f7ee9039bb51571637a

Aliases

arxiv: 1207.5280 · arxiv_version: 1207.5280v1 · doi: 10.48550/arxiv.1207.5280

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/FJ52CZB2ZUOK2OLQP2PFWQVXRB \
  | 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: 2a7ba1643acd1cad39707e9e5b42b7886c6aec8704a91f7ee9039bb51571637a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3c4486f17b3d4ab5b9b71834f79b3ef43546e8d62c2e5e53773c0ccbf3ba2e45",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-07-23T02:30:48Z",
    "title_canon_sha256": "941c81f3858d18d1ced823348374686de1989602546f52afecf100625390cf07"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.5280",
    "kind": "arxiv",
    "version": 1
  }
}