Pith Number

pith:M5OID5TN

pith:2012:M5OID5TNKDSD4J6HIBYD3AKNZP

not attested not anchored not stored refs pending

Discovery of Multiple Shells Around the Planetary Nebula IC 418

Gerardo Ramos-Larios, Hector Bravo-Alfaro, Lorenzo Olguin, Martin A. Guerrero, R.A. Marquez-Lugo, Roberto Vazquez

arxiv:1204.5816 v1 · 2012-04-26 · astro-ph.GA · 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{M5OID5TNKDSD4J6HIBYD3AKNZP}

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	2026-05-18T01:57:44.048947Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

675c81f66d50e43e27c740703d814dcbd84f9cc193b6e3e4102f870e653a6495

Aliases

arxiv: 1204.5816 · arxiv_version: 1204.5816v1 · doi: 10.48550/arxiv.1204.5816 · pith_short_12: M5OID5TNKDSD · pith_short_16: M5OID5TNKDSD4J6H · pith_short_8: M5OID5TN

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/M5OID5TNKDSD4J6HIBYD3AKNZP \
  | 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: 675c81f66d50e43e27c740703d814dcbd84f9cc193b6e3e4102f870e653a6495

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2029c50af7f5417bb27a5dd70eab77522e5d4fc23cd89d0763f72e7d4c8c373a",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2012-04-26T02:45:04Z",
    "title_canon_sha256": "709bad47d5621822db590c362d18bb95185e1ecc63e7abd1cebbb5974bd94295"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.5816",
    "kind": "arxiv",
    "version": 1
  }
}