Pith Number

pith:7QJFI6QR

pith:2018:7QJFI6QR4B6DDRK46CQV46LLBK

not attested not anchored not stored refs pending

A note on electromagnetic and gravitational perturbations of the Bardeen de Sitter black hole: quasinormal modes and greybody factors

Sahel Dey, Sayan Chakrabarti

arxiv:1807.09065 v3 · 2018-07-24 · 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{7QJFI6QR4B6DDRK46CQV46LLBK}

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	2026-05-17T23:42:43.109210Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc12547a11e07c31c55cf0a15e796b0ab750acea26bf9a691f5ef83a028016ad

Aliases

arxiv: 1807.09065 · arxiv_version: 1807.09065v3 · doi: 10.48550/arxiv.1807.09065 · pith_short_12: 7QJFI6QR4B6D · pith_short_16: 7QJFI6QR4B6DDRK4 · pith_short_8: 7QJFI6QR

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/7QJFI6QR4B6DDRK46CQV46LLBK \
  | 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: fc12547a11e07c31c55cf0a15e796b0ab750acea26bf9a691f5ef83a028016ad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5cbb5e2e26c16bda1490cba9ad555766de7baec4f23cd17be078267f828115e2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2018-07-24T12:28:09Z",
    "title_canon_sha256": "2ad6af86ea5a2f77f30ac46637d39dc3cd08c8ce6d55e9a14f7b87c16bbeaee2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.09065",
    "kind": "arxiv",
    "version": 3
  }
}