Pith Number

pith:ZNZGD5YX

pith:2018:ZNZGD5YXIFLZWWGH7BAXWP63EB

not attested not anchored not stored refs pending

Tales from the prehistory of Quantum Gravity. L\'eon Rosenfeld's earliest contribution

Alessio Rocci, Giulio Peruzzi

arxiv:1802.08878 v1 · 2018-02-24 · physics.hist-ph · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZNZGD5YXIFLZWWGH7BAXWP63EB}

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	2026-05-18T00:22:36.169493Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cb7261f71741579b58c7f8417b3fdb20512a22948f61ab3c729e4dcb6caa7a80

Aliases

arxiv: 1802.08878 · arxiv_version: 1802.08878v1 · doi: 10.48550/arxiv.1802.08878 · pith_short_12: ZNZGD5YXIFLZ · pith_short_16: ZNZGD5YXIFLZWWGH · pith_short_8: ZNZGD5YX

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/ZNZGD5YXIFLZWWGH7BAXWP63EB \
  | 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: cb7261f71741579b58c7f8417b3fdb20512a22948f61ab3c729e4dcb6caa7a80

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aa78642aa6ad2cf9dc9e79982ff348cf1c67adb7a875e6c0acf631ada699eeb8",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2018-02-24T16:51:30Z",
    "title_canon_sha256": "6f64ad317d3f6aeafaf305d2da2b4f281bef34e31d8f676ce7591173c5efc3e4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.08878",
    "kind": "arxiv",
    "version": 1
  }
}