Pith Number

pith:FUGXW5OX

pith:2021:FUGXW5OXRIYI5JN3HGFTQD2EWH

not attested not anchored not stored refs pending

The first law of entanglement entropy in AdS black hole backgrounds

Akihiro Ishibashi, Kengo Maeda

arxiv:2104.01862 v2 · 2021-04-05 · 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{FUGXW5OXRIYI5JN3HGFTQD2EWH}

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	2026-07-05T02:57:45.041766Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2d0d7b75d78a308ea5bb398b380f44b1cc8a4c680ce7221f0df52e8f8da65422

Aliases

arxiv: 2104.01862 · arxiv_version: 2104.01862v2 · doi: 10.48550/arxiv.2104.01862 · pith_short_12: FUGXW5OXRIYI · pith_short_16: FUGXW5OXRIYI5JN3 · pith_short_8: FUGXW5OX

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/FUGXW5OXRIYI5JN3HGFTQD2EWH \
  | 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: 2d0d7b75d78a308ea5bb398b380f44b1cc8a4c680ce7221f0df52e8f8da65422

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "978294b5667d18a3be0426b665b94c28ffe445d599c8e588ad285a29a3fa4ce1",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "hep-th",
    "submitted_at": "2021-04-05T11:53:47Z",
    "title_canon_sha256": "77af504c41c82529fd625fbd0975237a810a6fe478398c8e96986f5872801f31"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.01862",
    "kind": "arxiv",
    "version": 2
  }
}