Pith Number

pith:KQCMCNW5

pith:2014:KQCMCNW5QEGUBEAUHP4JA2KP2E

not attested not anchored not stored refs pending

Revised upper limit to energy extraction from a Kerr black hole

Jeremy D. Schnittman

arxiv:1410.6446 v2 · 2014-10-23 · astro-ph.HE · 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{KQCMCNW5QEGUBEAUHP4JA2KP2E}

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.

Cited by

1 paper in Pith

Superradiance -- the 2020 Edition

Receipt and verification

First computed	2026-05-18T01:40:59.696494Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5404c136dd810d4090143bf890694fd11d7bd098c35b2601d442a4cb92b6727c

Aliases

arxiv: 1410.6446 · arxiv_version: 1410.6446v2 · doi: 10.48550/arxiv.1410.6446 · pith_short_12: KQCMCNW5QEGU · pith_short_16: KQCMCNW5QEGUBEAU · pith_short_8: KQCMCNW5

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/KQCMCNW5QEGUBEAUHP4JA2KP2E \
  | 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: 5404c136dd810d4090143bf890694fd11d7bd098c35b2601d442a4cb92b6727c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "002ed7d217d21bfba1fbc7a733d691ed50d4d55f1b43047e552010a8d48e2ac2",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://creativecommons.org/licenses/publicdomain/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2014-10-23T18:30:46Z",
    "title_canon_sha256": "1f0b04cd397a8978b4a803a2990c34f179b4a6c7fc37bb710aa7c88691b325ac"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1410.6446",
    "kind": "arxiv",
    "version": 2
  }
}