Pith Number

pith:JGD2QN7P

pith:2011:JGD2QN7P6HPABF47NSZD55TXV4

not attested not anchored not stored refs pending

On Shear-free perturbations of f(R) gravity

Amare Abebe, Peter K. S. Dunsby, Rituparno Goswami

arxiv:1108.2900 v2 · 2011-08-14 · 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{JGD2QN7P6HPABF47NSZD55TXV4}

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	2026-05-18T02:21:37.227546Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4987a837eff1de00979f6cb23ef677af3bb8ebee219730515263db1f3623cb71

Aliases

arxiv: 1108.2900 · arxiv_version: 1108.2900v2 · doi: 10.48550/arxiv.1108.2900 · pith_short_12: JGD2QN7P6HPA · pith_short_16: JGD2QN7P6HPABF47 · pith_short_8: JGD2QN7P

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/JGD2QN7P6HPABF47NSZD55TXV4 \
  | 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: 4987a837eff1de00979f6cb23ef677af3bb8ebee219730515263db1f3623cb71

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0dfb9a12b58b9d46eb811997e2f722e57836f5052017503edf3bce4c1de96570",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2011-08-14T20:20:09Z",
    "title_canon_sha256": "50ee96c27ce15ef3012c5c801625796a8dc68a6b2245e9cb7983e576416191d2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1108.2900",
    "kind": "arxiv",
    "version": 2
  }
}