Pith Number

pith:XZRPI4J6

pith:2012:XZRPI4J666KGWG5LXSG4H5VBQN

not attested not anchored not stored refs pending

Age Dating Stellar Populations in the Near Infrared: An absolute age indicator from the presence/absence of red supergiants

A. Adamo, B. Davies, B. Plez, J. Zachary Gazak, M. A. Urbaneja, N. Bastian, R. P. Kudritzki

arxiv:1211.6841 v1 · 2012-11-29 · astro-ph.CO · 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{XZRPI4J666KGWG5LXSG4H5VBQN}

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	2026-05-18T01:52:53.437367Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

be62f4713ef7946b1babbc8dc3f6a1835adcb1d9cd2e026312a1ff947cc4f484

Aliases

arxiv: 1211.6841 · arxiv_version: 1211.6841v1 · doi: 10.48550/arxiv.1211.6841 · pith_short_12: XZRPI4J666KG · pith_short_16: XZRPI4J666KGWG5L · pith_short_8: XZRPI4J6

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/XZRPI4J666KGWG5LXSG4H5VBQN \
  | 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: be62f4713ef7946b1babbc8dc3f6a1835adcb1d9cd2e026312a1ff947cc4f484

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4441e16ef4caacb13a3fa46a33a9afe2f9faa4f2ebf134adcfd5fa75c36e0461",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-11-29T08:32:55Z",
    "title_canon_sha256": "199885823ddae5c45283d5e345fc7f58a339ca0d3aaa8fcf3abaebe20f1299a3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.6841",
    "kind": "arxiv",
    "version": 1
  }
}