Pith Number

pith:ZORXHH7J

pith:2008:ZORXHH7JGAAMEWVIZD7OZYJ5ID

not attested not anchored not stored refs pending

Exact solutions of f(R) gravity coupled to nonlinear electrodynamics

Francisco S. N. Lobo, Lukas Hollenstein

arxiv:0807.2325 v2 · 2008-07-15 · gr-qc · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZORXHH7JGAAMEWVIZD7OZYJ5ID}

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	2026-05-18T03:53:03.586602Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cba3739fe93000c25aa8c8feece13d40cac1acc3d2599dbc33dca0fcf5cd3863

Aliases

arxiv: 0807.2325 · arxiv_version: 0807.2325v2 · doi: 10.48550/arxiv.0807.2325 · pith_short_12: ZORXHH7JGAAM · pith_short_16: ZORXHH7JGAAMEWVI · pith_short_8: ZORXHH7J

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/ZORXHH7JGAAMEWVIZD7OZYJ5ID \
  | 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: cba3739fe93000c25aa8c8feece13d40cac1acc3d2599dbc33dca0fcf5cd3863

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4e3ed97087f450321acc398f0d7e8ff539dde66b99049aa8b51a2cbde4984950",
    "cross_cats_sorted": [
      "astro-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2008-07-15T11:25:47Z",
    "title_canon_sha256": "b46986ae83bcab200c79b4da26152653f4442afe36a926a55142998debc85458"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0807.2325",
    "kind": "arxiv",
    "version": 2
  }
}