Pith Number

pith:4FUHE7TW

pith:2012:4FUHE7TWQLTHHAZL6WZKECAY3Q

not attested not anchored not stored refs pending

Rule or exception? Planetary nebulae around hot subdwarf stars

2), (2) Consejo Superior de Investigaciones Cient\'ificas, (3) Instituto de Astrof\'isica de Andaluc\'ia - CSIC, (4) Departamento de Ciencias de la Navegaci\'on y de la Tierra, A. Aller (1), A Coru\~na, A. Ulla (1), C. Rodr\'iguez-L\'opez (3) ((1) Departamento de F\'isica Aplicada, E. P\'erez (1), Granada, L.F. Miranda (1, Madrid, M. Manteiga (4), R. Oreiro (3), Spain, Spain), Universidade da Coru\~na, Universidade de Vigo, Vigo

arxiv:1212.5412 v1 · 2012-12-21 · 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{4FUHE7TWQLTHHAZL6WZKECAY3Q}

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	2026-05-18T03:37:54.554236Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e168727e7682e673832bf5b2a20818dc0cd9f35816fa98e0398b0aff09522519

Aliases

arxiv: 1212.5412 · arxiv_version: 1212.5412v1 · doi: 10.48550/arxiv.1212.5412 · pith_short_12: 4FUHE7TWQLTH · pith_short_16: 4FUHE7TWQLTHHAZL · pith_short_8: 4FUHE7TW

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/4FUHE7TWQLTHHAZL6WZKECAY3Q \
  | 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: e168727e7682e673832bf5b2a20818dc0cd9f35816fa98e0398b0aff09522519

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2d2f8471a7f579a040ddfb39be25ffd0e001b7159b9e75402614645419160f80",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2012-12-21T12:19:53Z",
    "title_canon_sha256": "b9d83772d4bea9d058bf3ceca4405bbede6378c21017001dfce3aa1999f36adf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.5412",
    "kind": "arxiv",
    "version": 1
  }
}