Pith Number

pith:B43MCAKH

pith:2011:B43MCAKHT4WBK6UGS6O2CLZPKH

not attested not anchored not stored refs pending

Variation of fundamental parameters and dark energy. A principal component approach

A. C. O. Leite (U. Porto), A. Seganti (U. Roma "La Sapienza"), C. J. A. P. Martins (CAUP, L. Amendola (ITP, N. J. Nunes (ITP, P. O. J. Pedrosa (U. Porto), U. Heidelberg), U. Porto)

arxiv:1109.6793 v2 · 2011-09-30 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{B43MCAKHT4WBK6UGS6O2CLZPKH}

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	2026-05-18T02:00:21.042283Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0f36c101479f2c157a86979da12f2f51d2988f78687ba62a63e74c6255b98697

Aliases

arxiv: 1109.6793 · arxiv_version: 1109.6793v2 · doi: 10.48550/arxiv.1109.6793 · pith_short_12: B43MCAKHT4WB · pith_short_16: B43MCAKHT4WBK6UG · pith_short_8: B43MCAKH

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/B43MCAKHT4WBK6UGS6O2CLZPKH \
  | 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: 0f36c101479f2c157a86979da12f2f51d2988f78687ba62a63e74c6255b98697

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0679c7940442f6a6afd5a0270de6b74f266e1f3c7c7af578ecae17cb17bbbed5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-09-30T11:16:48Z",
    "title_canon_sha256": "7c4de297aea0a00f9a57f06d0140fb73359dd3d1f0518ec0ab937d7d555c5916"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.6793",
    "kind": "arxiv",
    "version": 2
  }
}