Pith Number

pith:FEPIYBUX

pith:2013:FEPIYBUXSOHITLXNTB3UV3WAMT

not attested not anchored not stored refs pending

The Entropy of a Vacuum: What Does the Covariant Entropy Count?

Sean J. Weinberg, Yasunori Nomura

arxiv:1310.7564 v3 · 2013-10-28 · hep-th · 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{FEPIYBUXSOHITLXNTB3UV3WAMT}

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	2026-05-18T02:38:16.990169Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

291e8c0697938e89aeed98774aeec064e8155cd4e0813aa6d8ad7dcb7e0b1c4e

Aliases

arxiv: 1310.7564 · arxiv_version: 1310.7564v3 · doi: 10.48550/arxiv.1310.7564 · pith_short_12: FEPIYBUXSOHI · pith_short_16: FEPIYBUXSOHITLXN · pith_short_8: FEPIYBUX

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/FEPIYBUXSOHITLXNTB3UV3WAMT \
  | 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: 291e8c0697938e89aeed98774aeec064e8155cd4e0813aa6d8ad7dcb7e0b1c4e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "94e67839b81fb4977d8b888b13204cf28aebdeaf5dc86b56ef790f62244edd4a",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-th",
    "submitted_at": "2013-10-28T19:59:41Z",
    "title_canon_sha256": "3511ca3852a5a04073dc55dd17f1aac6c699f041cc42f892f30ebc989a50d124"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1310.7564",
    "kind": "arxiv",
    "version": 3
  }
}