Pith Number

pith:Z5KRRE3I

pith:2009:Z5KRRE3IG2TITJ46YR4OJGVOCE

not attested not anchored not stored refs pending

WMAP 5-year constraints on time variation of $\alpha$ and $m_e$

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

arxiv:0910.1083 v2 · 2009-10-06 · 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{Z5KRRE3IG2TITJ46YR4OJGVOCE}

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.

Cited by

1 paper in Pith

What it takes to solve the Hubble tension through Modifications of Cosmological Recombination II: in light of ACT DR6 and DESI DR2

Receipt and verification

First computed	2026-07-04T17:22:38.839906Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cf5518936836a689a79ec478e49aae1106470678e7355fd9a88a719a75c97500

Aliases

arxiv: 0910.1083 · arxiv_version: 0910.1083v2 · doi: 10.48550/arxiv.0910.1083 · pith_short_12: Z5KRRE3IG2TI · pith_short_16: Z5KRRE3IG2TITJ46 · pith_short_8: Z5KRRE3I

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/Z5KRRE3IG2TITJ46YR4OJGVOCE \
  | 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: cf5518936836a689a79ec478e49aae1106470678e7355fd9a88a719a75c97500

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4d9df765762a24a6ec0f46617c14e265f79c73d8df59c7e3a0ef0a6161932761",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-10-06T20:04:58Z",
    "title_canon_sha256": "80e1449daf486761b293d38e22a52d8a602f37040276933ca8da851561e56e60"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.1083",
    "kind": "arxiv",
    "version": 2
  }
}