Pith Number

pith:QXVZ6BRU

pith:2012:QXVZ6BRUPHDTSSESWUJRCXBYP2

not attested not anchored not stored refs pending

The Fine Structure Constant and the CMB Damping Scale

Alessandro Melchiorri, C. J. A. P. Martins, Eloisa Menegoni, Erminia Calabrese, Maria Archidiacono, Silvia Galli

arxiv:1202.1476 v1 · 2012-02-07 · 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{QXVZ6BRUPHDTSSESWUJRCXBYP2}

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	2026-05-18T03:22:52.498702Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85eb9f063479c7394892b513115c387ebe6705417de0434cc178e373fcfcef09

Aliases

arxiv: 1202.1476 · arxiv_version: 1202.1476v1 · doi: 10.48550/arxiv.1202.1476 · pith_short_12: QXVZ6BRUPHDT · pith_short_16: QXVZ6BRUPHDTSSES · pith_short_8: QXVZ6BRU

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/QXVZ6BRUPHDTSSESWUJRCXBYP2 \
  | 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: 85eb9f063479c7394892b513115c387ebe6705417de0434cc178e373fcfcef09

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "04cb8cbe394260947a3cd975cefa9708e3377ed7ec8036cf8feab8a4c2bd4d65",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-02-07T17:46:25Z",
    "title_canon_sha256": "6a5c67f33efd214338889ccb38aa7d5733ed885d7d9d7897be36ef8b6146eadb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.1476",
    "kind": "arxiv",
    "version": 1
  }
}