Pith Number

pith:EWNQD62Q

pith:2018:EWNQD62QXHG7KZXYSA4WZ7WLDR

not attested not anchored not stored refs pending

The geometry and entanglement entropy of surfaces in loop quantum gravity

David Gr\"uber, Hanno Sahlmann, Thomas Zilker

arxiv:1806.05937 v1 · 2018-06-15 · 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{EWNQD62QXHG7KZXYSA4WZ7WLDR}

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	2026-05-18T00:04:48.676170Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

259b01fb50b9cdf566f890396cfecb1c5f469760590a3eba231ee8d7420063c8

Aliases

arxiv: 1806.05937 · arxiv_version: 1806.05937v1 · doi: 10.48550/arxiv.1806.05937 · pith_short_12: EWNQD62QXHG7 · pith_short_16: EWNQD62QXHG7KZXY · pith_short_8: EWNQD62Q

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/EWNQD62QXHG7KZXYSA4WZ7WLDR \
  | 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: 259b01fb50b9cdf566f890396cfecb1c5f469760590a3eba231ee8d7420063c8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c39200e1842c0fac0a3d31ebde3655635c9799af7245fcbc46db52dbe5da70c8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2018-06-15T12:56:46Z",
    "title_canon_sha256": "f026ce8dbba286dd788f0ae948a2161b956beee10f63885706ba311d7c8163ba"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.05937",
    "kind": "arxiv",
    "version": 1
  }
}