Pith Number

pith:DJTKH2DE

pith:2009:DJTKH2DEYMDR4XKKL6RSYSNHY7

not attested not anchored not stored refs pending

Double or binary: on the multiplicity of open star clusters

C. de la Fuente Marcos, R. de la Fuente Marcos

arxiv:0904.4017 v2 · 2009-04-26 · 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{DJTKH2DEYMDR4XKKL6RSYSNHY7}

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	2026-05-18T03:44:03.048706Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1a66a3e864c3071e5d4a5fa32c49a7c7d56603fe9d49d12478b581b21cdadce7

Aliases

arxiv: 0904.4017 · arxiv_version: 0904.4017v2 · doi: 10.48550/arxiv.0904.4017 · pith_short_12: DJTKH2DEYMDR · pith_short_16: DJTKH2DEYMDR4XKK · pith_short_8: DJTKH2DE

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/DJTKH2DEYMDR4XKKL6RSYSNHY7 \
  | 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: 1a66a3e864c3071e5d4a5fa32c49a7c7d56603fe9d49d12478b581b21cdadce7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "08326d9a0960c6ea862a2afd92c58815ae91d61abe047bdfb959064149a2c2e8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-04-26T10:53:49Z",
    "title_canon_sha256": "352da2c89a54a2f8208e7aea6b243c95f4c3a55d27c6e9fd68a1bbad698ced73"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.4017",
    "kind": "arxiv",
    "version": 2
  }
}