Pith Number

pith:4ZJGGDBC

pith:2020:4ZJGGDBC6CVY6UXR73A36XEIO5

not attested not anchored not stored refs pending

Is the free-energy principle a formal theory of semantics? From variational density dynamics to neural and phenotypic representations

Ines Hipolito, Karl Friston, Maxwell Ramstead

arxiv:2007.09291 v3 · 2020-07-18 · 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{4ZJGGDBC6CVY6UXR73A36XEIO5}

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	2026-07-05T06:31:55.385985Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e652630c22f0ab8f52f1fec1bf5c887752b17ee6d0b9d7106dfeee628593c354

Aliases

arxiv: 2007.09291 · arxiv_version: 2007.09291v3 · doi: 10.48550/arxiv.2007.09291 · pith_short_12: 4ZJGGDBC6CVY · pith_short_16: 4ZJGGDBC6CVY6UXR · pith_short_8: 4ZJGGDBC

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/4ZJGGDBC6CVY6UXR73A36XEIO5 \
  | 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: e652630c22f0ab8f52f1fec1bf5c887752b17ee6d0b9d7106dfeee628593c354

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9a233bd2befe339e65fa6d33dee6090179c49423aae173d9387babbd4b97fdfb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.NC",
    "submitted_at": "2020-07-18T00:51:57Z",
    "title_canon_sha256": "9501bde0c4a06156f33cdf3a722f90e7902688b21d37cacf9dd9ff999ad584d8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2007.09291",
    "kind": "arxiv",
    "version": 3
  }
}