Pith Number

pith:UPBLGSXJ

pith:2009:UPBLGSXJFO34AMH5L7OPBULLZD

not attested not anchored not stored refs pending

Holographic entanglement entropy of the BTZ black hole

M. Cadoni, M. Melis

arxiv:0907.1559 v2 · 2009-07-09 · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UPBLGSXJFO34AMH5L7OPBULLZD}

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	2026-05-18T02:34:38.976839Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3c2b34ae92bb7c030fd5fdcf0d16bc8f0791ca30b5f772f6bb8e5ccaab4d2f5

Aliases

arxiv: 0907.1559 · arxiv_version: 0907.1559v2 · doi: 10.48550/arxiv.0907.1559 · pith_short_12: UPBLGSXJFO34 · pith_short_16: UPBLGSXJFO34AMH5 · pith_short_8: UPBLGSXJ

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/UPBLGSXJFO34AMH5L7OPBULLZD \
  | 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: a3c2b34ae92bb7c030fd5fdcf0d16bc8f0791ca30b5f772f6bb8e5ccaab4d2f5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1732d04e9732c7ac94525d2b9c94c2cee933cac6ef8888fa5449fb2165c7890f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-th",
    "submitted_at": "2009-07-09T14:13:48Z",
    "title_canon_sha256": "ceac89e4f46b80ff393d5dd7fc27d89c58a9a50501106fd0d24f880cb3d4f440"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.1559",
    "kind": "arxiv",
    "version": 2
  }
}