Pith Number

pith:FGAKKJOY

pith:2021:FGAKKJOYWJK7SOXNU3JMSQIXG2

not attested not anchored not stored refs pending

Probing the time variation of fine structure constant using galaxy clusters and quintessence model

Kamal Bora, Tong-Jie Zhang, Wen-Fei Liu, Zhi-E Liu, Zhong-Xu Zhai

arxiv:2109.00134 v1 · 2021-09-01 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FGAKKJOYWJK7SOXNU3JMSQIXG2}

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	2026-07-05T03:34:34.191562Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2980a525d8b255f93aeda6d2c941173682d89aba42afd5147f2ab61dc8a3628a

Aliases

arxiv: 2109.00134 · arxiv_version: 2109.00134v1 · doi: 10.48550/arxiv.2109.00134 · pith_short_12: FGAKKJOYWJK7 · pith_short_16: FGAKKJOYWJK7SOXN · pith_short_8: FGAKKJOY

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/FGAKKJOYWJK7SOXNU3JMSQIXG2 \
  | 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: 2980a525d8b255f93aeda6d2c941173682d89aba42afd5147f2ab61dc8a3628a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "792fb6032dbf8f1d31d446d61fa5f71b8c8e54a8a853ce33e075b61e4e53e16d",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2021-09-01T01:05:11Z",
    "title_canon_sha256": "0d0dbc79b6ed9d34b57b5346de34647762a16a49a4158c58a5247ed0586c9b3d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.00134",
    "kind": "arxiv",
    "version": 1
  }
}