Pith Number

pith:O7OIKFEL

pith:2009:O7OIKFEL7Q2S6HSAOE3R5BIHBL

not attested not anchored not stored refs pending

Galactic chemical evolution in hierarchical formation models - I. Early-type galaxies in the local Universe

(2) Space Telescope Science Institute, 3), (3) Johns Hopkins University, (4) University of Central Lancashire), Brad K. Gibson (4) ((1) Kapteyn Astronomical Institute, Mat\'ias Arrigoni (1), Rachel S. Somerville (2, Scott C. Trager (1)

arxiv:0905.4189 v2 · 2009-05-26 · 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{O7OIKFEL7Q2S6HSAOE3R5BIHBL}

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	2026-05-18T02:13:31.982550Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

77dc85148bfc352f1e4071371e85070afc08d8f73bffa17ee644b32f928fb760

Aliases

arxiv: 0905.4189 · arxiv_version: 0905.4189v2 · doi: 10.48550/arxiv.0905.4189 · pith_short_12: O7OIKFEL7Q2S · pith_short_16: O7OIKFEL7Q2S6HSA · pith_short_8: O7OIKFEL

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/O7OIKFEL7Q2S6HSAOE3R5BIHBL \
  | 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: 77dc85148bfc352f1e4071371e85070afc08d8f73bffa17ee644b32f928fb760

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1d57076adad9307eef31ad8ea5900619449ab998d9d3e6a3ea3ffefec28e6db",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-05-26T12:56:26Z",
    "title_canon_sha256": "888262054f0f2aae357cd18e7b6163245e1cede0f70d8270fa05f0a67fee7224"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.4189",
    "kind": "arxiv",
    "version": 2
  }
}