Pith Number

pith:6BO2NDG5

pith:2013:6BO2NDG5UMHFRWC64WJWGA4FZH

not attested not anchored not stored refs pending

Contextual Focus: A Cognitive Explanation for the Cultural Revolution of the Middle/Upper Paleolithic

Liane Gabora

arxiv:1309.2609 v4 · 2013-09-10 · q-bio.NC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6BO2NDG5UMHFRWC64WJWGA4FZH}

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	2026-05-17T23:41:02.567260Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f05da68cdda30e58d85ee593630385c9f3298ad5076f5ca77cde624815ba20ac

Aliases

arxiv: 1309.2609 · arxiv_version: 1309.2609v4 · doi: 10.48550/arxiv.1309.2609 · pith_short_12: 6BO2NDG5UMHF · pith_short_16: 6BO2NDG5UMHFRWC6 · pith_short_8: 6BO2NDG5

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/6BO2NDG5UMHFRWC64WJWGA4FZH \
  | 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: f05da68cdda30e58d85ee593630385c9f3298ad5076f5ca77cde624815ba20ac

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "914861b3e4a31465e035744cc853cf57323c806e968e5bcf36c6034492e1c62b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.NC",
    "submitted_at": "2013-09-10T18:50:54Z",
    "title_canon_sha256": "0ae88711344aef2165291d67822bd2c76f441b9a7d527cb3c566480bc4d5e7b8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.2609",
    "kind": "arxiv",
    "version": 4
  }
}