Pith Number

pith:NDSCHFQ7

pith:2011:NDSCHFQ7QRG2LRKYYVTLQ4VBHU

not attested not anchored not stored refs pending

Iron and alpha-element Production in the First One Billion Years after the Big Bang

(2) Caltech, (3) Carnegie Observatories), George D. Becker (1), Michael Rauch (3), Robert F. Carswell (1) ((1) KICC/IoA Cambridge, Wallace L. W. Sargent (2)

arxiv:1111.4843 v1 · 2011-11-21 · 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{NDSCHFQ7QRG2LRKYYVTLQ4VBHU}

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	2026-05-18T01:59:27.577219Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68e423961f844da5c558c566b872a13d0526a23ea17f9bde554e1a9ef58f332d

Aliases

arxiv: 1111.4843 · arxiv_version: 1111.4843v1 · doi: 10.48550/arxiv.1111.4843 · pith_short_12: NDSCHFQ7QRG2 · pith_short_16: NDSCHFQ7QRG2LRKY · pith_short_8: NDSCHFQ7

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/NDSCHFQ7QRG2LRKYYVTLQ4VBHU \
  | 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: 68e423961f844da5c558c566b872a13d0526a23ea17f9bde554e1a9ef58f332d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "354617144975e2e7a5cbdd1f12d31dd5e64ec30eb304485446ea4b3fdc541d67",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-11-21T12:07:55Z",
    "title_canon_sha256": "e6c4ecb71fa80502d95f4f8be2938dd5ff4b6e16609f3d276c804ada5960f420"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1111.4843",
    "kind": "arxiv",
    "version": 1
  }
}