Pith Number

pith:KYMETZYK

pith:2012:KYMETZYKA2LULY4IC5WQLO7RDO

not attested not anchored not stored refs pending

NLTE determination of the calcium abundance and 3D corrections in extremely metal-poor stars

Elisabetta Caffau (GEPI, F. Spite (GEPI), Hans-G. Ludwig (ZAH), Monique Spite (GEPI), Patrick Fran\c{c}ois (GEPI), Piercarlo Bonifacio (GEPI), Roger Cayrel (GEPI), S. A. Korotin, S.M. Andrievsky (GEPI), ZAH)

arxiv:1204.1139 v1 · 2012-04-05 · astro-ph.SR · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KYMETZYKA2LULY4IC5WQLO7RDO}

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	2026-05-18T01:57:56.810096Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

561849e70a069745e388176d05bbf11b8135f8dd6ccc68436b7d94e6d524bcb3

Aliases

arxiv: 1204.1139 · arxiv_version: 1204.1139v1 · doi: 10.48550/arxiv.1204.1139 · pith_short_12: KYMETZYKA2LU · pith_short_16: KYMETZYKA2LULY4I · pith_short_8: KYMETZYK

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/KYMETZYKA2LULY4IC5WQLO7RDO \
  | 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: 561849e70a069745e388176d05bbf11b8135f8dd6ccc68436b7d94e6d524bcb3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e78397be348145525e4ea86a23c943b6a49e6d353b3f235aac221d29d89a1a9b",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2012-04-05T07:52:05Z",
    "title_canon_sha256": "4d7dfa47d6208017f62bd6ea8cbd32c067b55f00f26556599b23555652ee5f9e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.1139",
    "kind": "arxiv",
    "version": 1
  }
}