Pith Number

pith:UQRODQH6

pith:2010:UQRODQH6PQB7JE7CA3ZWFP2O6O

not attested not anchored not stored refs pending

Consequences of fluctuating group size for the evolution of cooperation

{\AA}ke Br\"annstr\"om, Bernd Blasius, Thilo gross, Ulf Dieckmann

arxiv:1010.5478 v1 · 2010-10-26 · q-bio.PE · cs.SI · 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{UQRODQH6PQB7JE7CA3ZWFP2O6O}

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	2026-05-18T04:38:38.664075Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a422e1c0fe7c03f493e206f362bf4ef3939dcf13bfdd347f66e0d5b1f4a17b39

Aliases

arxiv: 1010.5478 · arxiv_version: 1010.5478v1 · doi: 10.48550/arxiv.1010.5478 · pith_short_12: UQRODQH6PQB7 · pith_short_16: UQRODQH6PQB7JE7C · pith_short_8: UQRODQH6

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/UQRODQH6PQB7JE7CA3ZWFP2O6O \
  | 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: a422e1c0fe7c03f493e206f362bf4ef3939dcf13bfdd347f66e0d5b1f4a17b39

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c5b3dab70b27d5b0fe131c1c44cbc3d8e7dbc39c602a1e0fb79febb81b6a8e3f",
    "cross_cats_sorted": [
      "cs.SI",
      "physics.soc-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2010-10-26T18:47:58Z",
    "title_canon_sha256": "cabd448aeed103702f123f367fb88c25a32540cc4338b24026351996463e23d5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1010.5478",
    "kind": "arxiv",
    "version": 1
  }
}