Pith Number

pith:H4RDGDFN

pith:2012:H4RDGDFNOFYWIRKXP3KMLGLY2D

not attested not anchored not stored refs pending

Practical solutions for perturbed f(R) gravity

Alessandra Silvestri, Alireza Hojjati, Levon Pogosian, Starla Talbot

arxiv:1210.6880 v1 · 2012-10-25 · astro-ph.CO · 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{H4RDGDFNOFYWIRKXP3KMLGLY2D}

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	2026-05-18T03:38:43.495527Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f22330cad71716445577ed4c59978d0c663a9f1aabd91e1016f62576f5d2f9b

Aliases

arxiv: 1210.6880 · arxiv_version: 1210.6880v1 · doi: 10.48550/arxiv.1210.6880 · pith_short_12: H4RDGDFNOFYW · pith_short_16: H4RDGDFNOFYWIRKX · pith_short_8: H4RDGDFN

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/H4RDGDFNOFYWIRKXP3KMLGLY2D \
  | 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: 3f22330cad71716445577ed4c59978d0c663a9f1aabd91e1016f62576f5d2f9b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2652e6585b7b0ccd029ee69fcb8605f3ee4f64f0753cea5f18ed251f7a840cc6",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-10-25T15:42:43Z",
    "title_canon_sha256": "10195b7d0f32be89ec3a6f93d7c4f58d7f320a373b2d43cd472a4dd2ea66b024"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1210.6880",
    "kind": "arxiv",
    "version": 1
  }
}