Pith Number

pith:2PXU5JVO

pith:2015:2PXU5JVOVVRELYRC7BHBRTFLA3

not attested not anchored not stored refs pending

Cheating is evolutionarily assimilated with cooperation in the continuous snowdrift game

Isamu Okada, Tatsuya Sasaki

arxiv:1504.01948 v2 · 2015-04-08 · physics.soc-ph · nlin.AO · 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{2PXU5JVOVVRELYRC7BHBRTFLA3}

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	2026-05-18T02:07:26.311951Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d3ef4ea6aead6245e222f84e18ccab06f324e66bb167ea9d3c74b050327ff8d4

Aliases

arxiv: 1504.01948 · arxiv_version: 1504.01948v2 · doi: 10.48550/arxiv.1504.01948 · pith_short_12: 2PXU5JVOVVRE · pith_short_16: 2PXU5JVOVVRELYRC · pith_short_8: 2PXU5JVO

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/2PXU5JVOVVRELYRC7BHBRTFLA3 \
  | 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: d3ef4ea6aead6245e222f84e18ccab06f324e66bb167ea9d3c74b050327ff8d4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3ff1f0fa487a855e7c5223cd6ad4bf53341629bfd7d0e6def7107363aa2df256",
    "cross_cats_sorted": [
      "nlin.AO",
      "q-bio.PE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2015-04-08T13:15:17Z",
    "title_canon_sha256": "15248065fb55b99b7697019324fcdc484e5795b4307e124cd2b558eb940df5bd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.01948",
    "kind": "arxiv",
    "version": 2
  }
}