Pith Number

pith:CJX2GHP4

pith:2018:CJX2GHP4SVAEYTB3BTPBQNVUG6

not attested not anchored not stored refs pending

Two Cognitive Transitions Underlying the Capacity for Cultural Evolution

Cameron M. Smith, Liane Gabora

arxiv:1811.10431 v2 · 2018-11-23 · q-bio.NC · cs.MA · 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{CJX2GHP4SVAEYTB3BTPBQNVUG6}

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	2026-05-17T23:41:21.981045Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

126fa31dfc95404c4c3b0cde1836b437be723a00c95b1aa4f7f23801c82b3582

Aliases

arxiv: 1811.10431 · arxiv_version: 1811.10431v2 · doi: 10.48550/arxiv.1811.10431 · pith_short_12: CJX2GHP4SVAE · pith_short_16: CJX2GHP4SVAEYTB3 · pith_short_8: CJX2GHP4

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/CJX2GHP4SVAEYTB3BTPBQNVUG6 \
  | 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: 126fa31dfc95404c4c3b0cde1836b437be723a00c95b1aa4f7f23801c82b3582

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d28093947bcf4b47337ee1fd7aa8f4fddbc54b31ef2720d718096781194d28e1",
    "cross_cats_sorted": [
      "cs.MA",
      "q-bio.PE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.NC",
    "submitted_at": "2018-11-23T06:11:50Z",
    "title_canon_sha256": "54f3cc4fab6a60f85ae2d96b897b4320c2894e42c7dd97cbcfa9f7cbcd9dbb38"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.10431",
    "kind": "arxiv",
    "version": 2
  }
}