Pith Number

pith:NBW4I3NT

pith:2007:NBW4I3NTJQVEUVFMJNDBPPSGXT

not attested not anchored not stored refs pending

Some remarks on the dynamical systems approach to fourth order gravity

A. Troisi, P. K. S. Dunsby, S. Carloni

arxiv:0706.0452 v2 · 2007-06-04 · gr-qc · astro-ph · 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{NBW4I3NTJQVEUVFMJNDBPPSGXT}

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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

3 papers in Pith

On phase-space singular surfaces in $f(R)$ gravity

Spectrum of pure $R^2$ gravity: full Hamiltonian analysis

Modified Gravity and Cosmology

Receipt and verification

First computed	2026-07-04T15:47:21.026945Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

686dc46db34c2a4a54ac4b4617be46bcfba9a55db501300efd6dc929e866f613

Aliases

arxiv: 0706.0452 · arxiv_version: 0706.0452v2 · doi: 10.48550/arxiv.0706.0452 · pith_short_12: NBW4I3NTJQVE · pith_short_16: NBW4I3NTJQVEUVFM · pith_short_8: NBW4I3NT

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/NBW4I3NTJQVEUVFMJNDBPPSGXT \
  | 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: 686dc46db34c2a4a54ac4b4617be46bcfba9a55db501300efd6dc929e866f613

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "666f95bb14b359a77d2dcfe3c236fa35fbf059263c9a39e1411992fa29c96d78",
    "cross_cats_sorted": [
      "astro-ph",
      "hep-th"
    ],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "2007-06-04T19:06:54Z",
    "title_canon_sha256": "34bd9c134a19666b6dbaab23600aabbbd710e9d12785568d58fd519b9dae7766"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0706.0452",
    "kind": "arxiv",
    "version": 2
  }
}