Pith Number

pith:QFFGEDKS

pith:2008:QFFGEDKS6IXD2RIAEZWOT5YHES

not attested not anchored not stored refs pending

The Ages of Stars: The Horizontal Branch

M. Catelan (PUC-Chile)

arxiv:0811.2947 v2 · 2008-11-18 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QFFGEDKS6IXD2RIAEZWOT5YHES}

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	2026-05-18T02:15:20.644564Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

814a620d52f22e3d4500266ce9f70724a07f1bbb3268b3320634576611fd13cf

Aliases

arxiv: 0811.2947 · arxiv_version: 0811.2947v2 · doi: 10.48550/arxiv.0811.2947 · pith_short_12: QFFGEDKS6IXD · pith_short_16: QFFGEDKS6IXD2RIA · pith_short_8: QFFGEDKS

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/QFFGEDKS6IXD2RIAEZWOT5YHES \
  | 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: 814a620d52f22e3d4500266ce9f70724a07f1bbb3268b3320634576611fd13cf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a72ad9076f9d9a68de1b56a352db8b91427480d0761be0f90e3f6d131e46449d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-11-18T16:36:16Z",
    "title_canon_sha256": "44cff018ce7e7dd47a21640db7d5d87c859351b4c3152adc4f21177688eb23ce"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0811.2947",
    "kind": "arxiv",
    "version": 2
  }
}