Pith Number

pith:EIAFDQK5

pith:2016:EIAFDQK5VZUQID5K3XDDC3FDEU

not attested not anchored not stored refs pending

The Hydra I cluster core. I. Stellar populations in the cD galaxy NGC 3311

Carlos Eduardo Barbosa, Cl\'audia Mendes de Oliveira, Lodovico Coccato, Magda Arnaboldi, Michael Hilker, Tom Richtler

arxiv:1603.02202 v1 · 2016-03-07 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EIAFDQK5VZUQID5K3XDDC3FDEU}

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	2026-05-18T01:16:13.572682Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

220051c15dae69040faaddc6316ca32521914d0b09708dbfdb14774aa10c38af

Aliases

arxiv: 1603.02202 · arxiv_version: 1603.02202v1 · doi: 10.48550/arxiv.1603.02202 · pith_short_12: EIAFDQK5VZUQ · pith_short_16: EIAFDQK5VZUQID5K · pith_short_8: EIAFDQK5

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/EIAFDQK5VZUQID5K3XDDC3FDEU \
  | 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: 220051c15dae69040faaddc6316ca32521914d0b09708dbfdb14774aa10c38af

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7fb62cda00c5f041cdf974a474c30feb730790ef350e5da05e6a5e293e28071c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2016-03-07T18:53:46Z",
    "title_canon_sha256": "d67c65a96d4dd1cd8c1e6a4f7ff1335760885be6fc683612be481aac4b900b13"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1603.02202",
    "kind": "arxiv",
    "version": 1
  }
}