Pith Number

pith:QTIHCKJC

pith:2008:QTIHCKJCW2PTLAN7HDFR6FBJND

not attested not anchored not stored refs pending

Constraints on the time variation of the fine structure constant by the 5-year WMAP data

Jun'ichi Yokoyama, Masahiro Nakashima, Ryo Nagata

arxiv:0810.1098 v2 · 2008-10-07 · astro-ph · gr-qc · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QTIHCKJCW2PTLAN7HDFR6FBJND}

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	2026-05-18T02:35:14.474403Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

84d0712922b69f3581bf38cb1f142968c7f68be04865d56af2096dd3c01ceeb4

Aliases

arxiv: 0810.1098 · arxiv_version: 0810.1098v2 · doi: 10.48550/arxiv.0810.1098 · pith_short_12: QTIHCKJCW2PT · pith_short_16: QTIHCKJCW2PTLAN7 · pith_short_8: QTIHCKJC

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/QTIHCKJCW2PTLAN7HDFR6FBJND \
  | 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: 84d0712922b69f3581bf38cb1f142968c7f68be04865d56af2096dd3c01ceeb4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1d457730c2c33eff109a132953a512d05144279f52e4bbfd96f3c9dbed3bbfaf",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-10-07T04:49:25Z",
    "title_canon_sha256": "8b520fbb6f8ad412ea5cc21e0a3b8eb0506486eb80b520aebffb62b01873d992"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0810.1098",
    "kind": "arxiv",
    "version": 2
  }
}