Pith Number

pith:U5YB2BSH

pith:2013:U5YB2BSHEPVP73DV2NYWAJMY2F

not attested not anchored not stored refs pending

When is tit-for-tat unbeatable?

Burkhard C. Schipper, Joerg Oechssler, Peter Duersch

arxiv:1301.5683 v1 · 2013-01-24 · cs.GT · 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{U5YB2BSHEPVP73DV2NYWAJMY2F}

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	2026-05-18T03:35:37.709332Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a7701d064723eaffec75d371602598d158d4acc5bd310dfca02533a7cffc28e6

Aliases

arxiv: 1301.5683 · arxiv_version: 1301.5683v1 · doi: 10.48550/arxiv.1301.5683 · pith_short_12: U5YB2BSHEPVP · pith_short_16: U5YB2BSHEPVP73DV · pith_short_8: U5YB2BSH

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/U5YB2BSHEPVP73DV2NYWAJMY2F \
  | 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: a7701d064723eaffec75d371602598d158d4acc5bd310dfca02533a7cffc28e6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "da34c9a31ac6cc9093c4963d7f68dc0c893fff8286dd13bc5e7ea600736a3e2c",
    "cross_cats_sorted": [
      "q-bio.PE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.GT",
    "submitted_at": "2013-01-24T01:33:55Z",
    "title_canon_sha256": "6326da0fe4d7c54e08dc1de1824f4d0135d06430c0435dbcaf77e7d348121e25"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.5683",
    "kind": "arxiv",
    "version": 1
  }
}