Pith Number

pith:PMDCWR4Y

pith:2013:PMDCWR4YME25SJEEPTXVGVWF7A

not attested not anchored not stored refs pending

Massive stars at low metallicity: Evolution and surface abundances of O dwarfs in the SMC

D. John Hillier, Eric Depagne, Fabrice Martins, Ivan Hubeny, Jean-Claude Bouret, Thierry Lanz, Wagner L. F. Marcolino

arxiv:1304.6923 v1 · 2013-04-25 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PMDCWR4YME25SJEEPTXVGVWF7A}

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	2026-05-18T01:50:21.890120Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7b062b47986135d924847cef5356c5f81fddc44cca3a80e91bdd5d2815af381c

Aliases

arxiv: 1304.6923 · arxiv_version: 1304.6923v1 · doi: 10.48550/arxiv.1304.6923 · pith_short_12: PMDCWR4YME25 · pith_short_16: PMDCWR4YME25SJEE · pith_short_8: PMDCWR4Y

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/PMDCWR4YME25SJEEPTXVGVWF7A \
  | 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: 7b062b47986135d924847cef5356c5f81fddc44cca3a80e91bdd5d2815af381c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6e2ceda3407abe598a1ab78f8f017263a347311d8520d847fd9beb565299d2f0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2013-04-25T14:30:01Z",
    "title_canon_sha256": "81dc2bae5c4498ffdaf24ba66f35b54b0aabc16dd1e86513af6905d192fbfd17"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.6923",
    "kind": "arxiv",
    "version": 1
  }
}