Pith Number

pith:KC5ETC3C

pith:2018:KC5ETC3C75AQZ6GDHBIMLBLSXP

not attested not anchored not stored refs pending

Black Hole Shadow as a Test of General Relativity: Quadratic Gravity

Dimitry Ayzenberg, Nicolas Yunes

arxiv:1807.08422 v1 · 2018-07-23 · 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{KC5ETC3C75AQZ6GDHBIMLBLSXP}

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

2 papers in Pith

Reshaping the inner shadow of a Kerr black hole by a torn accretion disk

Probing Kalb-Ramond gravity with charged rotating black holes: constraints from EHT observations

Receipt and verification

First computed	2026-05-18T00:00:51.854511Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

50ba498b62ff410cf8c33850c58572bbf2f3e01464e78d5076acae89003834a3

Aliases

arxiv: 1807.08422 · arxiv_version: 1807.08422v1 · doi: 10.48550/arxiv.1807.08422 · pith_short_12: KC5ETC3C75AQ · pith_short_16: KC5ETC3C75AQZ6GD · pith_short_8: KC5ETC3C

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/KC5ETC3C75AQZ6GDHBIMLBLSXP \
  | 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: 50ba498b62ff410cf8c33850c58572bbf2f3e01464e78d5076acae89003834a3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c3329298ab8aa2234a72502edb1ef8d76dc5c195f7605612fa9a996eb9ce6ce4",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2018-07-23T03:51:18Z",
    "title_canon_sha256": "8e99c71a9ad9eac8b1b47de1e2de238f2c5456b948b0fba9c7d9dcbc0ff64f25"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.08422",
    "kind": "arxiv",
    "version": 1
  }
}