Pith Number

pith:AWPEYVAW

pith:2003:AWPEYVAWCDQNTWMYILEPKHWGV4

not attested not anchored not stored refs pending

Astrophysical constraints on hypothetical variability of fundamental constants

Russia), Sergei A. Levshakov (Ioffe Institute, St. Petersburg

arxiv:astro-ph/0309817 v2 · 2003-09-30 · 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{AWPEYVAWCDQNTWMYILEPKHWGV4}

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	2026-05-18T00:37:00.709681Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

059e4c541610e0d9d99842c8f51ec6af19de69afb25842509c1e303c923b6a81

Aliases

arxiv: astro-ph/0309817 · arxiv_version: astro-ph/0309817v2 · doi: 10.48550/arxiv.astro-ph/0309817 · pith_short_12: AWPEYVAWCDQN · pith_short_16: AWPEYVAWCDQNTWMY · pith_short_8: AWPEYVAW

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/AWPEYVAWCDQNTWMYILEPKHWGV4 \
  | 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: 059e4c541610e0d9d99842c8f51ec6af19de69afb25842509c1e303c923b6a81

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3a8c6f89f6efaeb05bb1951efec2dd0a57e9cd6f208f982234b2b6f4baae1908",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-09-30T10:16:24Z",
    "title_canon_sha256": "ab2d67fce2499e856875eb98585d73b241158876548c3ba93f95689b53e6204e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0309817",
    "kind": "arxiv",
    "version": 2
  }
}