Pith Number

pith:WH27BZNP

pith:2026:WH27BZNPNF3LJZDSKVYPVTRWNW

not attested not anchored not stored refs pending

Modified Friedmann equations and non-singular cosmologies in $d=4$ non-polynomial quasi-topological gravities

Jo\~ao Magueijo, Johanna Borissova

arxiv:2603.17654 v2 · 2026-03-18 · gr-qc · astro-ph.CO

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Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WH27BZNPNF3LJZDSKVYPVTRWNW}

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

8 papers in Pith

Null geodesic defocusing in dynamical black-hole-to-white-hole transitions

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

All $2D$ generalised dilaton theories from $d\geq 4$ gravities

Proca-Maxwell System in an Infinite Tower of Higher-Derivative Gravity

Scattering of electromagnetic field in quasi-topological gravity

Receipt and verification

First computed	2026-07-15T01:20:57.929600Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b1f5f0e5af6976b4e4725570face366dabfab7c6f9a9763fd073ebf00d295953

Aliases

arxiv: 2603.17654 · arxiv_version: 2603.17654v2 · doi: 10.48550/arxiv.2603.17654 · pith_short_12: WH27BZNPNF3L · pith_short_16: WH27BZNPNF3LJZDS · pith_short_8: WH27BZNP

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/WH27BZNPNF3LJZDSKVYPVTRWNW \
  | 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: b1f5f0e5af6976b4e4725570face366dabfab7c6f9a9763fd073ebf00d295953

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "82c031073ec1dce33486701ecd59d8d8c76289de643c69f95903a406821bfc81",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2026-03-18T12:19:14Z",
    "title_canon_sha256": "27abddb9e2f4cec7b787e135b6b577668563ca8b4cec78944b3899672ceee4ff"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2603.17654",
    "kind": "arxiv",
    "version": 2
  }
}