Pith Number

pith:BZJMVCPE

pith:2018:BZJMVCPERYUVNW2PD3UPREB64S

not attested not anchored not stored refs pending

Light escape cones in local reference frames of Kerr-de Sitter black hole spacetimes and related black hole shadows

Daniel Charbul\'ak, Jan Schee, Zden\v{e}k Stuchl\'ik

arxiv:1811.00072 v1 · 2018-10-31 · 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{BZJMVCPERYUVNW2PD3UPREB64S}

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	2026-05-18T00:01:48.326583Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0e52ca89e48e2956db4f1ee8f8903ee49b2c1ef7f5a8f45a88f59e95118d70d6

Aliases

arxiv: 1811.00072 · arxiv_version: 1811.00072v1 · doi: 10.48550/arxiv.1811.00072 · pith_short_12: BZJMVCPERYUV · pith_short_16: BZJMVCPERYUVNW2P · pith_short_8: BZJMVCPE

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/BZJMVCPERYUVNW2PD3UPREB64S \
  | 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: 0e52ca89e48e2956db4f1ee8f8903ee49b2c1ef7f5a8f45a88f59e95118d70d6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "87aa4a8aee745a2b06d3c57a5527ac4b86ebcb5cd916419392d229cd8dbe84ee",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2018-10-31T19:14:53Z",
    "title_canon_sha256": "32744566ea57fcc1f05c9c1a2eebb14a2c1749749ce66ae2c3d5b201cebd0d58"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.00072",
    "kind": "arxiv",
    "version": 1
  }
}