Pith Number

pith:Y544FTCO

pith:2018:Y544FTCOYTCUFNJYIIII263WTY

not attested not anchored not stored refs pending

$f\left(R,\nabla_{\mu_{1}}R,\dots,\nabla_{\mu_{1}}\dots\nabla_{\mu_{n}}R\right)$ theories of gravity in Einstein frame: A higher order modified Starobinsky inflation model in the Palatini approach

C. A. M. de Melo, L. G. Medeiros, P. J. Pompeia, R. R. Cuzinatto

arxiv:1806.08850 v4 · 2018-06-22 · 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{Y544FTCOYTCUFNJYIIII263WTY}

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	2026-05-17T23:47:03.144022Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c779c2cc4ec4c542b53842108d7b769e12d0f5d5862989fefdb7ceb660e66d56

Aliases

arxiv: 1806.08850 · arxiv_version: 1806.08850v4 · doi: 10.48550/arxiv.1806.08850 · pith_short_12: Y544FTCOYTCU · pith_short_16: Y544FTCOYTCUFNJY · pith_short_8: Y544FTCO

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/Y544FTCOYTCUFNJYIIII263WTY \
  | 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: c779c2cc4ec4c542b53842108d7b769e12d0f5d5862989fefdb7ceb660e66d56

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9ef2097d9109a30cb81addb5257b73e3bf20d5ca523f75f8b0d28c006272cd3b",
    "cross_cats_sorted": [
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2018-06-22T20:48:12Z",
    "title_canon_sha256": "e91b453ef3c97cf97d3f04af9018a299d9f0575917a20fe9b650fb47bdee4e80"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.08850",
    "kind": "arxiv",
    "version": 4
  }
}