Pith Number

pith:VRFAEZKP

pith:2011:VRFAEZKPZ4WPEC3GTSCZBEAYR4

not attested not anchored not stored refs pending

An upper limit to the secular variation of the gravitational constant from white dwarf stars

Enrique Garc\'ia-Berro, Jordi Isern, Leandro G. Althaus, Pablo Lor\'en-Aguilar, Santiago Torres

arxiv:1105.1992 v1 · 2011-05-10 · gr-qc · astro-ph.CO · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VRFAEZKPZ4WPEC3GTSCZBEAYR4}

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	2026-05-18T02:02:01.835568Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac4a02654fcf2cf20b669c859090188f08f02e643cc4ea83ac18d9ed8b60c167

Aliases

arxiv: 1105.1992 · arxiv_version: 1105.1992v1 · doi: 10.48550/arxiv.1105.1992 · pith_short_12: VRFAEZKPZ4WP · pith_short_16: VRFAEZKPZ4WPEC3G · pith_short_8: VRFAEZKP

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/VRFAEZKPZ4WPEC3GTSCZBEAYR4 \
  | 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: ac4a02654fcf2cf20b669c859090188f08f02e643cc4ea83ac18d9ed8b60c167

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "23e6a8834e649ef1486adcc76a3afe380d21062ff6b5a648908a84ff2e86d3a9",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2011-05-10T16:29:39Z",
    "title_canon_sha256": "bec680d6247752d6002c9ef5d595298260787d8e8b02b993c4c15fd60bad362e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1105.1992",
    "kind": "arxiv",
    "version": 1
  }
}