Pith Number

pith:PUKYGQP2

pith:2011:PUKYGQP2KCCB6XENPCQQEULPEF

not attested not anchored not stored refs pending

Can an astrophysical black hole have a topologically non-trivial event horizon?

Cosimo Bambi, Leonardo Modesto

arxiv:1107.4337 v2 · 2011-07-21 · gr-qc · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PUKYGQP2KCCB6XENPCQQEULPEF}

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	2026-05-18T03:58:26.465993Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7d158341fa50841f5c8d78a102516f21403419d45520c3f243faa36de255ac9e

Aliases

arxiv: 1107.4337 · arxiv_version: 1107.4337v2 · doi: 10.48550/arxiv.1107.4337 · pith_short_12: PUKYGQP2KCCB · pith_short_16: PUKYGQP2KCCB6XEN · pith_short_8: PUKYGQP2

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/PUKYGQP2KCCB6XENPCQQEULPEF \
  | 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: 7d158341fa50841f5c8d78a102516f21403419d45520c3f243faa36de255ac9e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "35c81fef589ec34188d645e604b09c816c26f92ab4a08ba6f57c204357b24a01",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2011-07-21T18:39:35Z",
    "title_canon_sha256": "dd20194f6e73f3000a0e2bb8b9707afca9e33f26bc13211df2865d71661e6cf7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.4337",
    "kind": "arxiv",
    "version": 2
  }
}