Pith Number

pith:5HIYSULO

pith:2000:5HIYSULOMDKMFTHPHVFNAFR7WZ

not attested not anchored not stored refs pending

Testing cosmological variability of fundamental constants

A. V. Ivanchik (Ioffe Phys.-Tech. Inst., A. Y. Potekhin, D. A. Varshalovich, St.Petersburg)

arxiv:physics/0004062 v1 · 2000-04-25 · physics.atom-ph · astro-ph · physics.gen-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{5HIYSULOMDKMFTHPHVFNAFR7WZ}

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	2026-05-18T01:05:15.390125Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e9d189516e60d4c2ccef3d4ad0163fb650956642f237cb85f1b25a46a5e9431d

Aliases

arxiv: physics/0004062 · arxiv_version: physics/0004062v1 · doi: 10.48550/arxiv.physics/0004062 · pith_short_12: 5HIYSULOMDKM · pith_short_16: 5HIYSULOMDKMFTHP · pith_short_8: 5HIYSULO

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/5HIYSULOMDKMFTHPHVFNAFR7WZ \
  | 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: e9d189516e60d4c2ccef3d4ad0163fb650956642f237cb85f1b25a46a5e9431d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0f51974cdddd13ec27a0baab988c2b6bab35ec5e760d01a9b02f156a742825e2",
    "cross_cats_sorted": [
      "astro-ph",
      "physics.gen-ph"
    ],
    "license": "",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2000-04-25T14:18:49Z",
    "title_canon_sha256": "b88c1b6bed7d991a8c1f19e8ff1b6fb123a8f31c9341c44fd71b0ef8170edf37"
  },
  "schema_version": "1.0",
  "source": {
    "id": "physics/0004062",
    "kind": "arxiv",
    "version": 1
  }
}