Pith Number

pith:EQTQDEJF

pith:2009:EQTQDEJF2MZ3TWBP2TQF6AZVMM

not attested not anchored not stored refs pending

Probing the f(R) formalism through gravitational wave polarizations

Jose C.N. de Araujo, Marcio E.S. Alves, Oswaldo D. Miranda

arxiv:0908.0861 v1 · 2009-08-06 · gr-qc · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EQTQDEJF2MZ3TWBP2TQF6AZVMM}

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	2026-05-18T02:12:37.041992Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2427019125d333b9d82fd4e05f0335631b707f80d35c5ebf9dd5d3ce7ddf495b

Aliases

arxiv: 0908.0861 · arxiv_version: 0908.0861v1 · doi: 10.48550/arxiv.0908.0861 · pith_short_12: EQTQDEJF2MZ3 · pith_short_16: EQTQDEJF2MZ3TWBP · pith_short_8: EQTQDEJF

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/EQTQDEJF2MZ3TWBP2TQF6AZVMM \
  | 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: 2427019125d333b9d82fd4e05f0335631b707f80d35c5ebf9dd5d3ce7ddf495b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1d24c9fd41ac47ad8b76e1b70a56887ca50f7f0101cd6fa05fca4354c5299e4a",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2009-08-06T13:03:43Z",
    "title_canon_sha256": "97c7ca7a3db62f68d2c59a3cf0eb1fe0535a477f18b545df90e10a8f81c8e905"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.0861",
    "kind": "arxiv",
    "version": 1
  }
}