Pith Number

pith:GR6KRLJ4

pith:2012:GR6KRLJ4VBUQRKBD5FWKZ5RNGZ

not attested not anchored not stored refs pending

A ~60 Myr periodicity is common to marine-87Sr/86Sr, fossil biodiversity, and large-scale sedimentation: what does the periodicity reflect?

Adrian L. Melott (Kansas), John M. McArthur (University College London), K. D. Petersen (Aarhus Univ.), Richard K. Bambach (National Museum of Natural History)

arxiv:1206.1804 v1 · 2012-06-08 · astro-ph.EP · astro-ph.GA · physics.bio-ph · physics.geo-ph · q-bio.PE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GR6KRLJ4VBUQRKBD5FWKZ5RNGZ}

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	2026-05-18T03:53:55.383985Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

347ca8ad3ca86908a823e96cacf62d36770beef858bd5385ea8b433e3edec4de

Aliases

arxiv: 1206.1804 · arxiv_version: 1206.1804v1 · doi: 10.48550/arxiv.1206.1804 · pith_short_12: GR6KRLJ4VBUQ · pith_short_16: GR6KRLJ4VBUQRKBD · pith_short_8: GR6KRLJ4

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/GR6KRLJ4VBUQRKBD5FWKZ5RNGZ \
  | 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: 347ca8ad3ca86908a823e96cacf62d36770beef858bd5385ea8b433e3edec4de

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6568581cf1d06d8fb1f229baee5e94a1ac440594bd2a57bfe65ba9814ec434f2",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "physics.bio-ph",
      "physics.geo-ph",
      "q-bio.PE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2012-06-08T16:21:58Z",
    "title_canon_sha256": "58c0eda7453982a0aac52686c5fc6b17fd5d7345e971a18521c73024f22ca32f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1206.1804",
    "kind": "arxiv",
    "version": 1
  }
}