Pith Number

pith:G5JWD6YQ

pith:2009:G5JWD6YQJCWGU2TFGY3H6KETDH

not attested not anchored not stored refs pending

A bird's eye view of f(R)-gravity

M. De Laurentis, S. Capozziello, V. Faraoni

arxiv:0909.4672 v2 · 2009-09-25 · gr-qc · astro-ph.CO · 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{G5JWD6YQJCWGU2TFGY3H6KETDH}

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

1 paper in Pith

Modified Gravity Theories on a Nutshell: Inflation, Bounce and Late-time Evolution

Receipt and verification

First computed	2026-05-18T02:11:37.719699Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

375361fb1048ac6a6a6536367f289319ddd1c21d906f6fd2be944fb4ff0c764c

Aliases

arxiv: 0909.4672 · arxiv_version: 0909.4672v2 · doi: 10.48550/arxiv.0909.4672 · pith_short_12: G5JWD6YQJCWG · pith_short_16: G5JWD6YQJCWGU2TF · pith_short_8: G5JWD6YQ

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/G5JWD6YQJCWGU2TFGY3H6KETDH \
  | 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: 375361fb1048ac6a6a6536367f289319ddd1c21d906f6fd2be944fb4ff0c764c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fd05c4db9c1789f3ff2514515e2a43e4a605fd9b59f0d5a336a120f98b041c21",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2009-09-25T15:18:49Z",
    "title_canon_sha256": "8c8b33690d6bb0d8b7414a4ed0f6fd535b87e38b80c208b3e17fd97bdab7ce8a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.4672",
    "kind": "arxiv",
    "version": 2
  }
}