Pith Number

pith:WY2KSVVI

pith:2009:WY2KSVVIIXPCODCT7WYEB66GXN

not attested not anchored not stored refs pending

Abundance ratios in red-sequence galaxies over a wide mass range: The "X-planes" for magnesium, calcium, carbon and nitrogen

John R. Lucey, Michael J. Hudson, Russell J. Smith, Terry J. Bridges

arxiv:0903.2473 v3 · 2009-03-16 · 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{WY2KSVVIIXPCODCT7WYEB66GXN}

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	2026-05-18T02:14:28.337588Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b634a956a845de270c53fdb040fbc6bb418200cabf7119eef44721354b2d0885

Aliases

arxiv: 0903.2473 · arxiv_version: 0903.2473v3 · doi: 10.48550/arxiv.0903.2473 · pith_short_12: WY2KSVVIIXPC · pith_short_16: WY2KSVVIIXPCODCT · pith_short_8: WY2KSVVI

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/WY2KSVVIIXPCODCT7WYEB66GXN \
  | 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: b634a956a845de270c53fdb040fbc6bb418200cabf7119eef44721354b2d0885

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "410f1c11655847b36a8864f41182db998c7eff954029f9ea4799f0df2b03d7bb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-03-16T14:55:07Z",
    "title_canon_sha256": "40b244deefe774d610ad1ff6b113be5553935d30ae33021d84aa81425e74720f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.2473",
    "kind": "arxiv",
    "version": 3
  }
}