Pith Number

pith:MRR62VD7

pith:2012:MRR62VD7GNU44WULGMQUHAOKHC

not attested not anchored not stored refs pending

Modeling the onset of photosynthesis after the Chicxulub asteroid impact

Noel Perez, Osmel Martin, Reinaldo Rojas, Rolando Cardenas

arxiv:1209.4381 v1 · 2012-09-19 · astro-ph.EP · physics.ao-ph · physics.geo-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MRR62VD7GNU44WULGMQUHAOKHC}

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	2026-05-18T03:45:11.881382Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6463ed547f3369ce5a8b33214381ca38a82f7678ffb97a29b1506348e05f8635

Aliases

arxiv: 1209.4381 · arxiv_version: 1209.4381v1 · doi: 10.48550/arxiv.1209.4381 · pith_short_12: MRR62VD7GNU4 · pith_short_16: MRR62VD7GNU44WUL · pith_short_8: MRR62VD7

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/MRR62VD7GNU44WULGMQUHAOKHC \
  | 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: 6463ed547f3369ce5a8b33214381ca38a82f7678ffb97a29b1506348e05f8635

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8d5c7297d40ee78cd45e4c2ecf09747971e922069c5aa4e804b9fdc7f0aa8c29",
    "cross_cats_sorted": [
      "physics.ao-ph",
      "physics.geo-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2012-09-19T22:06:49Z",
    "title_canon_sha256": "27ecb9973a825187b554d384edcde600fe54f53462e00357fca9b4bdeef6fe12"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.4381",
    "kind": "arxiv",
    "version": 1
  }
}