Pith Number

pith:NY7KQKTY

pith:2007:NY7KQKTYLHE67YSPJS4GDASXOF

not attested not anchored not stored refs pending

Variation of fundamental constants: theory and observations

V.V. Flambaum

arxiv:0705.3704 v2 · 2007-05-25 · physics.atom-ph · astro-ph · hep-ph · nucl-th

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NY7KQKTYLHE67YSPJS4GDASXOF}

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	2026-07-04T15:24:15.532762Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6e3ea82a7859c9efe24f4cb8618257717fdacbb9f4e99654ebbf96525362ba2f

Aliases

arxiv: 0705.3704 · arxiv_version: 0705.3704v2 · doi: 10.48550/arxiv.0705.3704 · pith_short_12: NY7KQKTYLHE6 · pith_short_16: NY7KQKTYLHE67YSP · pith_short_8: NY7KQKTY

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/NY7KQKTYLHE67YSPJS4GDASXOF \
  | 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: 6e3ea82a7859c9efe24f4cb8618257717fdacbb9f4e99654ebbf96525362ba2f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "be181facb8b18ee7b79f9de5a848d7ae24d1571c1da8553cfa090d6b01da567f",
    "cross_cats_sorted": [
      "astro-ph",
      "hep-ph",
      "nucl-th"
    ],
    "license": "",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2007-05-25T07:00:00Z",
    "title_canon_sha256": "b1ef6d75be60a93ec879786dd7f12b689c17e81b1103fe82808c2661386e0c71"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0705.3704",
    "kind": "arxiv",
    "version": 2
  }
}