Pith Number

pith:FI7KJASG

pith:2001:FI7KJASGWFKLSVADUNZPKOBRNC

not attested not anchored not stored refs pending

A Simple Varying-alpha Cosmology

H.B. Sandvik, J.D. Barrow, J. Magueijo

arxiv:astro-ph/0107512 v3 · 2001-07-26 · astro-ph · gr-qc · 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{FI7KJASGWFKLSVADUNZPKOBRNC}

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

Challenges for $\Lambda$CDM: An update

Receipt and verification

First computed	2026-05-18T02:40:36.093229Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2a3ea48246b154b95403a372f53831688d328dda75dca5fe860ceff3e6ae4ba7

Aliases

arxiv: astro-ph/0107512 · arxiv_version: astro-ph/0107512v3 · doi: 10.48550/arxiv.astro-ph/0107512 · pith_short_12: FI7KJASGWFKL · pith_short_16: FI7KJASGWFKLSVAD · pith_short_8: FI7KJASG

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/FI7KJASGWFKLSVADUNZPKOBRNC \
  | 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: 2a3ea48246b154b95403a372f53831688d328dda75dca5fe860ceff3e6ae4ba7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4fa45f3605376f3fb285c816dcf482d0b685968554d62a3d34906331c1553fe2",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-ph"
    ],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-07-26T19:03:16Z",
    "title_canon_sha256": "3776cbad50262171c44608a9ce636319252b7486dd911c9a38851a46e5768871"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0107512",
    "kind": "arxiv",
    "version": 3
  }
}