Pith Number

pith:5KHRGECI

pith:2025:5KHRGECII6QFKYGUKFPFRJ3IFF

not attested not anchored not stored refs pending

Energy and information: a chronicle of hesitations on the role of the observer in physics

Didier Lairez

arxiv:2509.06957 v1 · 2025-05-26 · physics.hist-ph · cond-mat.stat-mech

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5KHRGECII6QFKYGUKFPFRJ3IFF}

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	2026-07-05T12:07:12.837279Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ea8f13104847a05560d4515e58a768295e0641ce166e5c1a69bbce40b4331d0a

Aliases

arxiv: 2509.06957 · arxiv_version: 2509.06957v1 · doi: 10.48550/arxiv.2509.06957 · pith_short_12: 5KHRGECII6QF · pith_short_16: 5KHRGECII6QFKYGU · pith_short_8: 5KHRGECI

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/5KHRGECII6QFKYGUKFPFRJ3IFF \
  | 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: ea8f13104847a05560d4515e58a768295e0641ce166e5c1a69bbce40b4331d0a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bb760fc48186838dac07577c9747183dd4a292a2e04c6ba7fc0ecbd0c7ae3977",
    "cross_cats_sorted": [
      "cond-mat.stat-mech"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2025-05-26T13:59:26Z",
    "title_canon_sha256": "e19f0e8d3730a7807f0a6000a641c613bc99ab2237efa1da1b7d60981ec7d9d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2509.06957",
    "kind": "arxiv",
    "version": 1
  }
}