Pith Number

pith:N27BPNTK

pith:2009:N27BPNTKVUYQ7YWH5P2R6YC4OZ

not attested not anchored not stored refs pending

Cooperation in the Prisoner's Dilemma game in Random Scale-Free Graphs

J. Gomez-Gardenes, J. Poncela, L.M. Floria, Y. Moreno

arxiv:0901.1923 v1 · 2009-01-14 · 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{N27BPNTKVUYQ7YWH5P2R6YC4OZ}

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	2026-05-18T02:15:02.420932Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6ebe17b66aad310fe2c7ebf51f605c766e00e97e61712a417b8b96c291482c2b

Aliases

arxiv: 0901.1923 · arxiv_version: 0901.1923v1 · doi: 10.48550/arxiv.0901.1923 · pith_short_12: N27BPNTKVUYQ · pith_short_16: N27BPNTKVUYQ7YWH · pith_short_8: N27BPNTK

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/N27BPNTKVUYQ7YWH5P2R6YC4OZ \
  | 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: 6ebe17b66aad310fe2c7ebf51f605c766e00e97e61712a417b8b96c291482c2b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7edfba78d5ed7c077377b544d09113c8e5197ef4b6664ed1ef04616ab288ca4d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2009-01-14T19:24:19Z",
    "title_canon_sha256": "cfd66563331a5a4b342a7aaf8c2be5a2bbb5cc74c418f7875fb0f14b3c239a8f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.1923",
    "kind": "arxiv",
    "version": 1
  }
}