Pith Number

pith:R4375IQI

pith:2011:R4375IQIEETXF5SHFVCMU4RBFG

not attested not anchored not stored refs pending

Isotropisation of Quadratic Gravity: Scalar and Tensor Components

Daniel M\"uller, Jos\'e C. N. de Araujo, M\'arcio E. S. Alves

arxiv:1103.3439 v2 · 2011-03-17 · gr-qc · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{R4375IQIEETXF5SHFVCMU4RBFG}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T03:17:12.252186Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8f37fea208212772f6472d44ca722129be84534f552788c9eb236c3c8af82ab4

Aliases

arxiv: 1103.3439 · arxiv_version: 1103.3439v2 · doi: 10.48550/arxiv.1103.3439 · pith_short_12: R4375IQIEETX · pith_short_16: R4375IQIEETXF5SH · pith_short_8: R4375IQI

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/R4375IQIEETXF5SHFVCMU4RBFG \
  | 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: 8f37fea208212772f6472d44ca722129be84534f552788c9eb236c3c8af82ab4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "14ca785518bd219b5c3118787c08b84f04eed60f5c7c0d37454f3c853bee07a1",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2011-03-17T15:51:51Z",
    "title_canon_sha256": "8dc588d40385c7118180871379be5c4fa798a58b223bacee7e9ec7f989e21a49"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1103.3439",
    "kind": "arxiv",
    "version": 2
  }
}