Pith Number

pith:SUKFEHPW

pith:2019:SUKFEHPW2CTHLBJQOQL5DNCL4O

not attested not anchored not stored refs pending

Extraction of energy from an extremal rotating electrovacuum black hole: Particle collisions along the axis of symmetry

F. Hejda, J. Bi\v{c}\'ak, O. B. Zaslavskii

arxiv:1904.02035 v2 · 2019-04-03 · 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{SUKFEHPW2CTHLBJQOQL5DNCL4O}

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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.

Cited by

1 paper in Pith

Penrose and super-Penrose energy extraction from a Reissner-Nordstr\"om black hole spacetime with a cosmological constant through the BSW mechanism: Full story

Receipt and verification

First computed	2026-07-05T00:11:57.973585Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9514521df6d0a67585307417d1b44be3aef9f69af8d64a672ec2a9815963ea1e

Aliases

arxiv: 1904.02035 · arxiv_version: 1904.02035v2 · doi: 10.48550/arxiv.1904.02035 · pith_short_12: SUKFEHPW2CTH · pith_short_16: SUKFEHPW2CTHLBJQ · pith_short_8: SUKFEHPW

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/SUKFEHPW2CTHLBJQOQL5DNCL4O \
  | 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: 9514521df6d0a67585307417d1b44be3aef9f69af8d64a672ec2a9815963ea1e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d2919a840d62f637707729877183dab5ca29479e869bffa155d2c45dae38fcd3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2019-04-03T14:45:31Z",
    "title_canon_sha256": "51fd5c2f8e2311462e2c879203b5cd82daa4a2aab078e3fd9303e36ccf91a86b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.02035",
    "kind": "arxiv",
    "version": 2
  }
}