Pith Number

pith:7EPAVXB7

pith:1995:7EPAVXB7QM2WHS66D4QB5PQWTE

not attested not anchored not stored refs pending

Astrophysical Limits on the Evolution of Dimensionless Physical Constants over Cosmological Time

Antoinette Songaila (Univ. of Hawaii, IfA), Lennox L. Cowie

arxiv:astro-ph/9507062 v2 · 1995-07-16 · astro-ph · hep-ex · 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{7EPAVXB7QM2WHS66D4QB5PQWTE}

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	2026-05-18T04:18:14.298377Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f91e0adc3f833563cbde1f201ebe169906b3cc384f7b3b55f353c6689c7a5084

Aliases

arxiv: astro-ph/9507062 · arxiv_version: astro-ph/9507062v2 · doi: 10.48550/arxiv.astro-ph/9507062 · pith_short_12: 7EPAVXB7QM2W · pith_short_16: 7EPAVXB7QM2WHS66 · pith_short_8: 7EPAVXB7

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/7EPAVXB7QM2WHS66D4QB5PQWTE \
  | 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: f91e0adc3f833563cbde1f201ebe169906b3cc384f7b3b55f353c6689c7a5084

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0e4d3bb608fd8e3ef5a029b070b1174ec41c8c75ef9e83c06ed9a7dd2253a7dd",
    "cross_cats_sorted": [
      "hep-ex",
      "hep-ph"
    ],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1995-07-16T00:49:50Z",
    "title_canon_sha256": "6098faefcb052572471c3e2e515c014562ebd76e1679a4ee8261341eac318444"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9507062",
    "kind": "arxiv",
    "version": 2
  }
}