Pith Number

pith:NLIUBV6D

pith:2021:NLIUBV6D7CSJPNGLJ2HELMM22D

not attested not anchored not stored refs pending

How particular is the physics of the free energy principle?

Alexander Tschantz, Beren Millidge, Christopher L. Buckley, Miguel Aguilera

arxiv:2105.11203 v3 · 2021-05-24 · 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{NLIUBV6D7CSJPNGLJ2HELMM22D}

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	2026-07-05T04:24:55.442797Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6ad140d7c3f8a497b4cb4e8e45b19ad0c2bbf12b8f67f726ce2bafcc703f1f7e

Aliases

arxiv: 2105.11203 · arxiv_version: 2105.11203v3 · doi: 10.48550/arxiv.2105.11203 · pith_short_12: NLIUBV6D7CSJ · pith_short_16: NLIUBV6D7CSJPNGL · pith_short_8: NLIUBV6D

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/NLIUBV6D7CSJPNGLJ2HELMM22D \
  | 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: 6ad140d7c3f8a497b4cb4e8e45b19ad0c2bbf12b8f67f726ce2bafcc703f1f7e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "53ea2c72ff90cc623474e1440cbab75215f3d7a6c95afeb31a0a45b7d72bfc00",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "q-bio.NC",
    "submitted_at": "2021-05-24T11:17:10Z",
    "title_canon_sha256": "30cb8d05708862f9eb7cdbc5242dba519df7906db28b854fbaa36417d76fe0ec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2105.11203",
    "kind": "arxiv",
    "version": 3
  }
}