Pith Number

pith:N2N7NJQ5

pith:2020:N2N7NJQ5XVW2KNNG7BGP6DCWRY

not attested not anchored not stored refs pending

Impossible measurements require impossible apparatus

Christopher J. Fewster, Henning Bostelmann, Maximilian H. Ruep

arxiv:2003.04660 v4 · 2020-03-10 · quant-ph · gr-qc · hep-th · math-ph · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{N2N7NJQ5XVW2KNNG7BGP6DCWRY}

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.

Cited by

3 papers in Pith

Quantum Reference Fields Transformations in Linearized Quantum Gravity

Rethinking quantum information in gravity and fields

Axions on de Sitter space

Receipt and verification

First computed	2026-07-05T02:34:39.308674Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6e9bf6a61dbd6da535a6f84cff0c568e176ae667cc82caf4863e56e1abe400cd

Aliases

arxiv: 2003.04660 · arxiv_version: 2003.04660v4 · doi: 10.48550/arxiv.2003.04660 · pith_short_12: N2N7NJQ5XVW2 · pith_short_16: N2N7NJQ5XVW2KNNG · pith_short_8: N2N7NJQ5

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/N2N7NJQ5XVW2KNNG7BGP6DCWRY \
  | 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: 6e9bf6a61dbd6da535a6f84cff0c568e176ae667cc82caf4863e56e1abe400cd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b8ffe8d29e8bdd4a12a5821b1ec79db518ad6f1d80f1322cfa3b5bad0a12b477",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-th",
      "math-ph",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2020-03-10T12:25:10Z",
    "title_canon_sha256": "95113f9c2a22b11b43e34a45a9463b0b30a12aa8ccf428c49ee03fa8e90fdf4b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2003.04660",
    "kind": "arxiv",
    "version": 4
  }
}