Pith Number

pith:RVHRQCGN

pith:1998:RVHRQCGNN2USC3U3BRDIQPTI73

not attested not anchored not stored refs pending

Constraining Variations in the Fine-Structure Constant with the Cosmic Microwave Background

Manoj Kaplinghat, Michael S. Turner, Robert J. Scherrer

arxiv:astro-ph/9810133 v2 · 1998-10-08 · astro-ph · 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{RVHRQCGNN2USC3U3BRDIQPTI73}

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	2026-07-04T16:07:05.543712Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8d4f1808cd6ea9216e9b0c46883e68fef066d2f678782266956f8a662acfeb8f

Aliases

arxiv: astro-ph/9810133 · arxiv_version: astro-ph/9810133v2 · doi: 10.48550/arxiv.astro-ph/9810133 · pith_short_12: RVHRQCGNN2US · pith_short_16: RVHRQCGNN2USC3U3 · pith_short_8: RVHRQCGN

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/RVHRQCGNN2USC3U3BRDIQPTI73 \
  | 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: 8d4f1808cd6ea9216e9b0c46883e68fef066d2f678782266956f8a662acfeb8f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6a20f5dbaac4120c393b6d75dfebec32336617a53c51422a8b5453380b7c1077",
    "cross_cats_sorted": [
      "hep-ph"
    ],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-10-08T15:21:45Z",
    "title_canon_sha256": "cf014e850fecfb59b5ec87f2e39aa64fd6beac50b692b2e61e8de243c5090212"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9810133",
    "kind": "arxiv",
    "version": 2
  }
}