Pith Number

pith:C56DJHEN

pith:2015:C56DJHENNCWCIZFJCOYKBVF7A7

not attested not anchored not stored refs pending

Structured populations facilitate cooperation in policed Public Goods Games

Gereon A. Kaiping, Simon J. Cox, Timothy J. Sluckin

arxiv:1503.04180 v2 · 2015-03-13 · 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{C56DJHENNCWCIZFJCOYKBVF7A7}

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	2026-05-18T01:24:38.429534Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

177c349c8d68ac2464a913b0a0d4bf07e2855531d7a9a77f3091610e2922f9aa

Aliases

arxiv: 1503.04180 · arxiv_version: 1503.04180v2 · doi: 10.48550/arxiv.1503.04180 · pith_short_12: C56DJHENNCWC · pith_short_16: C56DJHENNCWCIZFJ · pith_short_8: C56DJHEN

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/C56DJHENNCWCIZFJCOYKBVF7A7 \
  | 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: 177c349c8d68ac2464a913b0a0d4bf07e2855531d7a9a77f3091610e2922f9aa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d52b86cfa5f4ce8f042ffa97bc03d2f8d001af67abb0a8e8f18c626a8a936da5",
    "cross_cats_sorted": [
      "physics.soc-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2015-03-13T18:33:13Z",
    "title_canon_sha256": "7df65833ad8db36462201067ef636094e5addbe730c58850e838236382744d55"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.04180",
    "kind": "arxiv",
    "version": 2
  }
}