Pith Number

pith:HGAH5IES

pith:2013:HGAH5IESUFCA46SRX2NYQN7KZA

not attested not anchored not stored refs pending

Spatial population expansion promotes the evolution of cooperation in an experimental Prisoner's Dilemma

J. David Van Dyken, Keenan M.L. Mack, Melanie J.I. Muller, Michael M. Desai

arxiv:1311.2646 v1 · 2013-11-11 · q-bio.PE · physics.bio-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{HGAH5IESUFCA46SRX2NYQN7KZA}

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	2026-05-18T03:07:22.254483Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

39807ea092a1440e7a51be9b8837eac80f71a780985a0177a41eea5f7b0d08f7

Aliases

arxiv: 1311.2646 · arxiv_version: 1311.2646v1 · doi: 10.48550/arxiv.1311.2646 · pith_short_12: HGAH5IESUFCA · pith_short_16: HGAH5IESUFCA46SR · pith_short_8: HGAH5IES

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/HGAH5IESUFCA46SRX2NYQN7KZA \
  | 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: 39807ea092a1440e7a51be9b8837eac80f71a780985a0177a41eea5f7b0d08f7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d266e217b6624dd07738c7884f0b0f5177bb92b77c326611ce58bcf18de5ea4b",
    "cross_cats_sorted": [
      "physics.bio-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2013-11-11T23:41:57Z",
    "title_canon_sha256": "aedb08354e211ba3f7502f1ff6206ad5f7a07b0c0180193ca1f49dcde296c86d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.2646",
    "kind": "arxiv",
    "version": 1
  }
}