Pith Number

pith:JH3ZECPI

pith:2018:JH3ZECPIP2KCU7QWIR77NNRARA

not attested not anchored not stored refs pending

Identity, Kinship, and the Evolution of Cooperation

Burton Voorhees, Dwight Read, Liane Gabora

arxiv:1809.06530 v1 · 2018-09-18 · q-bio.PE · physics.soc-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{JH3ZECPIP2KCU7QWIR77NNRARA}

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	2026-05-18T00:05:25.482308Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

49f79209e87e942a7e16447ff6b620881d51c1d017c6355a50eca8b56f1b4750

Aliases

arxiv: 1809.06530 · arxiv_version: 1809.06530v1 · doi: 10.48550/arxiv.1809.06530 · pith_short_12: JH3ZECPIP2KC · pith_short_16: JH3ZECPIP2KCU7QW · pith_short_8: JH3ZECPI

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/JH3ZECPIP2KCU7QWIR77NNRARA \
  | 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: 49f79209e87e942a7e16447ff6b620881d51c1d017c6355a50eca8b56f1b4750

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "faedae6b82fcadf1edab624aff4615ab48d680c5be8a0b5d735fe5be335a8160",
    "cross_cats_sorted": [
      "physics.soc-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2018-09-18T04:50:02Z",
    "title_canon_sha256": "a4e3c9002fc341e19689cf9e49c917d2d200b4cf49968dfde316d1e2b5010ee7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.06530",
    "kind": "arxiv",
    "version": 1
  }
}