Pith Number

pith:CGTGIUHS

pith:2009:CGTGIUHSSJI3QNGBAMHGVFA2JZ

not attested not anchored not stored refs pending

New Constraints on variations of the fine structure constant from CMB anisotropies

Alessandro Melchiorri, Carlos J. A. P. Martins, Eloisa Menegoni, James Bartlett, Silvia Galli

arxiv:0909.3584 v1 · 2009-09-19 · astro-ph.CO · astro-ph.GA · gr-qc · hep-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CGTGIUHSSJI3QNGBAMHGVFA2JZ}

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	2026-05-18T04:38:17.393693Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

11a66450f29251b834c1030e6a941a4e6f7baa03929e9589bd56f3f73da2889c

Aliases

arxiv: 0909.3584 · arxiv_version: 0909.3584v1 · doi: 10.48550/arxiv.0909.3584 · pith_short_12: CGTGIUHSSJI3 · pith_short_16: CGTGIUHSSJI3QNGB · pith_short_8: CGTGIUHS

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/CGTGIUHSSJI3QNGBAMHGVFA2JZ \
  | 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: 11a66450f29251b834c1030e6a941a4e6f7baa03929e9589bd56f3f73da2889c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "62e50b74df326ad195ede39a1980f30bbedf012b1bdc177c6c09c70704ea7a5d",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "gr-qc",
      "hep-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-09-19T13:25:46Z",
    "title_canon_sha256": "1381ae3116b2fdb97a786aeb67daee98dc0dcf0df9b7c186548ea36522f38dc2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.3584",
    "kind": "arxiv",
    "version": 1
  }
}