Pith Number

pith:PNP3OQJN

pith:2012:PNP3OQJNMKONQIKLH6473S7DV4

not attested not anchored not stored refs pending

A complex speciation-richness relationship in a simple neutral model

Dominique Gravel, Philippe Desjardins-Proulx

arxiv:1203.3884 v2 · 2012-03-17 · 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{PNP3OQJNMKONQIKLH6473S7DV4}

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	2026-05-18T03:49:21.877062Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7b5fb7412d629cd8214b3fb9fdcbe3af2b21bd2099ade10dfe4e07584e6e05fe

Aliases

arxiv: 1203.3884 · arxiv_version: 1203.3884v2 · doi: 10.48550/arxiv.1203.3884 · pith_short_12: PNP3OQJNMKON · pith_short_16: PNP3OQJNMKONQIKL · pith_short_8: PNP3OQJN

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/PNP3OQJNMKONQIKLH6473S7DV4 \
  | 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: 7b5fb7412d629cd8214b3fb9fdcbe3af2b21bd2099ade10dfe4e07584e6e05fe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "817d7b0c73196548ca945d7c799c60c689b4aae9c2d38c92ead67db595448d3b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2012-03-17T18:25:57Z",
    "title_canon_sha256": "aeebd71ceda81a14ddbde29f2d7d61a96595688924a60a279f1759038613cfee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.3884",
    "kind": "arxiv",
    "version": 2
  }
}