Pith Number

pith:QBVOAGFU

pith:2008:QBVOAGFUCEJERNHHYETQOQD2K4

not attested not anchored not stored refs pending

WMAP 5-year constraints on time variation of $\alpha$ and $m_e$ in a detailed recombination scenario

Claudia G. Sc\'occola, Hector Vucetich, Susana. J. Landau

arxiv:0809.5028 v2 · 2008-09-29 · astro-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{QBVOAGFUCEJERNHHYETQOQD2K4}

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	2026-07-04T15:15:34.085844Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

806ae018b4111248b4e7c12707407a573aa8f8134a15ed894665591bb051f863

Aliases

arxiv: 0809.5028 · arxiv_version: 0809.5028v2 · doi: 10.48550/arxiv.0809.5028 · pith_short_12: QBVOAGFUCEJE · pith_short_16: QBVOAGFUCEJERNHH · pith_short_8: QBVOAGFU

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/QBVOAGFUCEJERNHHYETQOQD2K4 \
  | 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: 806ae018b4111248b4e7c12707407a573aa8f8134a15ed894665591bb051f863

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "02f08c2e6f9747625d8ef5c55b88c0bc3797e7ba8465c2ec2b7a209b602a67dd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-09-29T17:43:59Z",
    "title_canon_sha256": "3a56ae007ab178a9b7167b3bc88c99bf4533f6c1b471a09a816499daff6b4102"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.5028",
    "kind": "arxiv",
    "version": 2
  }
}