Pith Number

pith:IRGBAF7D

pith:2011:IRGBAF7DW2NPAV2ABYS3ZVXJCO

not attested not anchored not stored refs pending

Spin fluids in Bianchi-I f(R)-cosmology with torsion

Luca Fabbri, Stefano Vignolo

arxiv:1109.5821 v2 · 2011-09-27 · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IRGBAF7DW2NPAV2ABYS3ZVXJCO}

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	2026-05-18T03:49:47.471736Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

444c1017e3b69af057400e25bcd6e913926898f4afdda822da736627daaafac4

Aliases

arxiv: 1109.5821 · arxiv_version: 1109.5821v2 · doi: 10.48550/arxiv.1109.5821 · pith_short_12: IRGBAF7DW2NP · pith_short_16: IRGBAF7DW2NPAV2A · pith_short_8: IRGBAF7D

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/IRGBAF7DW2NPAV2ABYS3ZVXJCO \
  | 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: 444c1017e3b69af057400e25bcd6e913926898f4afdda822da736627daaafac4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a06a796d6a074a60ba4dd26515cd96317d4ded54548aec29bb6f1de6b726f9b3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2011-09-27T09:48:31Z",
    "title_canon_sha256": "e107be2228263cbf299274107d748b7f7198f4f156ed958a1e319b6cb2e81f8f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.5821",
    "kind": "arxiv",
    "version": 2
  }
}