Pith Number

pith:WPAFDZ7H

pith:2001:WPAFDZ7H5KUIB6JIADQ5SDIHDR

not attested not anchored not stored refs pending

A new constraint on cosmological variability of the proton-to-electron mass ratio

Garching, Germany; (3)Osservatorio Astronomico di Trieste, Italy), M. Dessauges-Zavadsky (2), Mitaka, P. Molaro (3) ((1)NAOJ, S. A. Levshakov (1), S. D'odorico (2), Tokyo; (2)ESO

arxiv:astro-ph/0106194 v2 · 2001-06-12 · astro-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{WPAFDZ7H5KUIB6JIADQ5SDIHDR}

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	2026-05-18T02:40:36.251223Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b3c051e7e7eaa880f92800e1d90d071c7767f2b3374a96d01c55d2a70efdd339

Aliases

arxiv: astro-ph/0106194 · arxiv_version: astro-ph/0106194v2 · doi: 10.48550/arxiv.astro-ph/0106194 · pith_short_12: WPAFDZ7H5KUI · pith_short_16: WPAFDZ7H5KUIB6JI · pith_short_8: WPAFDZ7H

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/WPAFDZ7H5KUIB6JIADQ5SDIHDR \
  | 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: b3c051e7e7eaa880f92800e1d90d071c7767f2b3374a96d01c55d2a70efdd339

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4f0f4b3597f96032651782933e091d6806f3a42a2ab7eb3981beac58211c8d43",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-06-12T08:28:38Z",
    "title_canon_sha256": "be06333a6fefa47625e4c2afae69edd5a62b2cc1136c0bdfde08cc226444b7ee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0106194",
    "kind": "arxiv",
    "version": 2
  }
}