Pith Number

pith:2AMZ42HO

pith:2009:2AMZ42HOPMK3KA3ZWW7NEPBVBP

not attested not anchored not stored refs pending

Old stellar population synthesis: New age and mass estimates for Mayall II = G1

et al, Jun Ma, Richard de Grijs, Soo-Chang Rey, Xu Zhou, Zhenyu Wu, Zhou Fan

arxiv:0904.0674 v1 · 2009-04-04 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2AMZ42HOPMK3KA3ZWW7NEPBVBP}

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	2026-05-18T02:14:07.575462Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d0199e68ee7b15b50379b5bed23c350bec86d7df9fc02ba87c4ef1bbfacbacae

Aliases

arxiv: 0904.0674 · arxiv_version: 0904.0674v1 · doi: 10.48550/arxiv.0904.0674 · pith_short_12: 2AMZ42HOPMK3 · pith_short_16: 2AMZ42HOPMK3KA3Z · pith_short_8: 2AMZ42HO

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/2AMZ42HOPMK3KA3ZWW7NEPBVBP \
  | 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: d0199e68ee7b15b50379b5bed23c350bec86d7df9fc02ba87c4ef1bbfacbacae

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e5d4187739130db7e57e0d255ace0685c7606bfa5cad344f2c571e2bcfbfdc40",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-04-04T03:02:40Z",
    "title_canon_sha256": "c2798a154f708046c5c8615b0dc8d73a3b8f91d390f2f635a619c5088b2a81b6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.0674",
    "kind": "arxiv",
    "version": 1
  }
}