Pith Number

pith:3OCUPTEF

pith:2013:3OCUPTEFKYRFJQPQLO5RLWHGHX

not attested not anchored not stored refs pending

Search for carbon stars and DZ white dwarfs in SDSS spectra survey through machine learning

Ali Luo, Fuchao Wu, Jianmin Si, Jiannan Zhang, Peng Wei, Yihong Wu, Yinbi Li, Yongheng Zhao

arxiv:1309.1883 v3 · 2013-09-07 · astro-ph.IM · astro-ph.SR

Open paper page JSON Open Graph Bundle Merged state 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

✓ 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	2026-05-18T03:03:56.513197Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

db8547cc85562254c1f05bbb15d8e63dda30493e62919198f572d93cab8706da

Aliases

arxiv: 1309.1883 · arxiv_version: 1309.1883v3 · doi: 10.48550/arxiv.1309.1883 · pith_short_12: 3OCUPTEFKYRF · pith_short_16: 3OCUPTEFKYRFJQPQ · pith_short_8: 3OCUPTEF

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/3OCUPTEFKYRFJQPQLO5RLWHGHX \
  | 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: db8547cc85562254c1f05bbb15d8e63dda30493e62919198f572d93cab8706da

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "383d013180e7f1e565051c2a7e59e217ec251819e187a031960a9a1f4f3c65d6",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2013-09-07T16:54:11Z",
    "title_canon_sha256": "a86d8c54e0ac2d259dc308e36b2d18490735306d18d161f9792322c541117992"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.1883",
    "kind": "arxiv",
    "version": 3
  }
}