Pith Number

pith:7NVCPNK4

pith:2017:7NVCPNK43AMYRGRKJA4H4EKKBC

not attested not anchored not stored refs pending

Fisher matrix forecasts for astrophysical tests of the stability of the fine-structure constant

A. C. O. Leite, C. J. A. P. Martins, C. S. Alves, T. A. Silva

arxiv:1704.08728 v1 · 2017-04-27 · astro-ph.CO · gr-qc · hep-ph · hep-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{7NVCPNK43AMYRGRKJA4H4EKKBC}

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	2026-05-18T00:45:25.424281Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fb6a27b55cd819889a2a48387e114a088775a0d92de79c3dfedaa450d00ac98e

Aliases

arxiv: 1704.08728 · arxiv_version: 1704.08728v1 · doi: 10.48550/arxiv.1704.08728 · pith_short_12: 7NVCPNK43AMY · pith_short_16: 7NVCPNK43AMYRGRK · pith_short_8: 7NVCPNK4

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/7NVCPNK43AMYRGRKJA4H4EKKBC \
  | 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: fb6a27b55cd819889a2a48387e114a088775a0d92de79c3dfedaa450d00ac98e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "acf850654c70a51d1d58dc41e5b91775c04ec8dd0911470a46a8d39c3bc64133",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-ph",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2017-04-27T19:38:57Z",
    "title_canon_sha256": "a56814ea23273871b9c5aee4cfeb3007b201792d8afb745af09728c650ea9529"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1704.08728",
    "kind": "arxiv",
    "version": 1
  }
}