Pith Number

pith:ZQKQDYCO

pith:2019:ZQKQDYCOFQ3HQEA5E2HMHNO5LU

not attested not anchored not stored refs pending

Black holes and other exact spherical solutions in Quadratic Gravity

Alena Pravdova, Jiri Podolsky, Robert Svarc, Vojtech Pravda

arxiv:1907.00046 v2 · 2019-06-28 · gr-qc · hep-th

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZQKQDYCOFQ3HQEA5E2HMHNO5LU}

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

Quasi-topological gravity for 4-dimensional Taub-NUT, near-horizon extreme Kerr, and swirling symmetries

Effective geometrodynamics for renormalization-group improved black-hole spacetimes in spherical symmetry

Receipt and verification

First computed	2026-07-05T00:33:13.581778Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cc1501e04e2c3678101d268ec3b5dd5d3ff67f7f691b6cd2ab2cf453c97d73c6

Aliases

arxiv: 1907.00046 · arxiv_version: 1907.00046v2 · doi: 10.48550/arxiv.1907.00046 · pith_short_12: ZQKQDYCOFQ3H · pith_short_16: ZQKQDYCOFQ3HQEA5 · pith_short_8: ZQKQDYCO

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/ZQKQDYCOFQ3HQEA5E2HMHNO5LU \
  | 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: cc1501e04e2c3678101d268ec3b5dd5d3ff67f7f691b6cd2ab2cf453c97d73c6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e91bf890d3ce76048658feedfd289b2f6e1a0e2f37957517bcb81352a24ba96e",
    "cross_cats_sorted": [
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2019-06-28T19:21:25Z",
    "title_canon_sha256": "39fa07e199328535a7c54f033c1196525ad514fb80d67fd685564b7159570e20"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.00046",
    "kind": "arxiv",
    "version": 2
  }
}