Pith Number

pith:6IAENGW4

pith:2012:6IAENGW4SNGRMRVNZOP7PROFFN

not attested not anchored not stored refs pending

Groupwise information sharing promotes ingroup favoritism in indirect reciprocity

Mitsuhiro Nakamura, Naoki Masuda

arxiv:1207.5663 v2 · 2012-07-24 · physics.soc-ph · cs.SI · q-bio.PE

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6IAENGW4SNGRMRVNZOP7PROFFN}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T03:40:35.980987Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f200469adc934d1646adcb9ff7c5c52b41caa59d94d089b9594c5ea531f6c31a

Aliases

arxiv: 1207.5663 · arxiv_version: 1207.5663v2 · doi: 10.48550/arxiv.1207.5663 · pith_short_12: 6IAENGW4SNGR · pith_short_16: 6IAENGW4SNGRMRVN · pith_short_8: 6IAENGW4

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/6IAENGW4SNGRMRVNZOP7PROFFN \
  | 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: f200469adc934d1646adcb9ff7c5c52b41caa59d94d089b9594c5ea531f6c31a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ff13b257753dc16ad5550512e087bb5edee5c389cc0e7bcfb1674d7b267c4a08",
    "cross_cats_sorted": [
      "cs.SI",
      "q-bio.PE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2012-07-24T11:38:57Z",
    "title_canon_sha256": "b7ea5b4ca53d6dd90becc78f69221bf38885fa04ebf6e374552d29bf9c75278c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.5663",
    "kind": "arxiv",
    "version": 2
  }
}