Pith Number

pith:7I2B7FMN

pith:2011:7I2B7FMNWWXUCCDRZX7C6HHWB7

not attested not anchored not stored refs pending

The young open cluster Berkeley 55

Amparo Marco (Alicante), Ignacio Negueruela

arxiv:1112.0414 v1 · 2011-12-02 · astro-ph.GA · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7I2B7FMNWWXUCCDRZX7C6HHWB7}

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	2026-05-18T03:31:32.906360Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fa341f958db5af410871cdfe2f1cf60fcd3f38d44b0e27c7d84a355bf52d6276

Aliases

arxiv: 1112.0414 · arxiv_version: 1112.0414v1 · doi: 10.48550/arxiv.1112.0414 · pith_short_12: 7I2B7FMNWWXU · pith_short_16: 7I2B7FMNWWXUCCDR · pith_short_8: 7I2B7FMN

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/7I2B7FMNWWXUCCDRZX7C6HHWB7 \
  | 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: fa341f958db5af410871cdfe2f1cf60fcd3f38d44b0e27c7d84a355bf52d6276

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c429b392f1cb5f7633b1fac31076a5d77eba6cc5152bf7852b6e3c2ecfa6ec50",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2011-12-02T10:05:17Z",
    "title_canon_sha256": "b14dc996c2be14bd78a5b0ed2f771ec7f18e53e049609df3af4810da0c86be5e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.0414",
    "kind": "arxiv",
    "version": 1
  }
}