Pith Number

pith:IQ4NUY3Z

pith:2010:IQ4NUY3ZISBVMR4G45DNVOFEMR

not attested not anchored not stored refs pending

Punish, but not too hard: How costly punishment spreads in the spatial public goods game

Attila Szolnoki, Dirk Helbing, Gyorgy Szabo, Matjaz Perc

arxiv:1007.0431 v1 · 2010-07-02 · physics.soc-ph · physics.bio-ph · q-bio.PE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IQ4NUY3ZISBVMR4G45DNVOFEMR}

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	2026-05-18T04:42:43.140900Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4438da63794483564786e746dab8a4644f936c00c7f74675a9834a285136b300

Aliases

arxiv: 1007.0431 · arxiv_version: 1007.0431v1 · doi: 10.48550/arxiv.1007.0431 · pith_short_12: IQ4NUY3ZISBV · pith_short_16: IQ4NUY3ZISBVMR4G · pith_short_8: IQ4NUY3Z

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/IQ4NUY3ZISBVMR4G45DNVOFEMR \
  | 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: 4438da63794483564786e746dab8a4644f936c00c7f74675a9834a285136b300

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "08c39a7f2a3b550ffda6de20111c55ffbbcc9e401e6c79b771e480232a3cd15e",
    "cross_cats_sorted": [
      "physics.bio-ph",
      "q-bio.PE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2010-07-02T19:04:45Z",
    "title_canon_sha256": "b06577d294fc6781ac3a68f0ae33611072a5f2029da4cf003ec4f013a2f2618a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1007.0431",
    "kind": "arxiv",
    "version": 1
  }
}