Pith Number

pith:JF2W5I4L

pith:2019:JF2W5I4LPUUOF5KVUWYGLSOHV4

not attested not anchored not stored refs pending

First steps to a constructor theory of cognition

Riccardo Franco

arxiv:1904.09829 v1 · 2019-03-21 · cs.AI · quant-ph · stat.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JF2W5I4LPUUOF5KVUWYGLSOHV4}

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	2026-05-17T23:48:03.144890Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

49756ea38b7d28e2f555a5b065c9c7af346ffbdd1bea278083f33d16782409af

Aliases

arxiv: 1904.09829 · arxiv_version: 1904.09829v1 · doi: 10.48550/arxiv.1904.09829 · pith_short_12: JF2W5I4LPUUO · pith_short_16: JF2W5I4LPUUOF5KV · pith_short_8: JF2W5I4L

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/JF2W5I4LPUUOF5KVUWYGLSOHV4 \
  | 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: 49756ea38b7d28e2f555a5b065c9c7af346ffbdd1bea278083f33d16782409af

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5cb61c39b866408d4f7aaa111c80209275c7bfed627016750154ba41904c38dc",
    "cross_cats_sorted": [
      "quant-ph",
      "stat.AP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2019-03-21T23:39:13Z",
    "title_canon_sha256": "9f18cbc92c644a38e82da4d1717dd9158f1a760fcfcbba897bac45893d6ae7cf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.09829",
    "kind": "arxiv",
    "version": 1
  }
}