Pith Number

pith:E2YTMK6X

pith:2016:E2YTMK6XGJ6YFVFLRYFIVGU7XD

not attested not anchored not stored refs pending

New Constraints on Spatial Variations of the Fine Structure Constant from Clusters of Galaxies

C.J.A.P. Martins, D. Kocevski, H. Ebeling, I. De Martino

arxiv:1612.06739 v1 · 2016-12-20 · 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{E2YTMK6XGJ6YFVFLRYFIVGU7XD}

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	2026-05-18T00:54:15.169420Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

26b1362bd7327d82d4ab8e0a8a9a9fb8c0efda47fd985bf30852d52462736641

Aliases

arxiv: 1612.06739 · arxiv_version: 1612.06739v1 · doi: 10.48550/arxiv.1612.06739 · pith_short_12: E2YTMK6XGJ6Y · pith_short_16: E2YTMK6XGJ6YFVFL · pith_short_8: E2YTMK6X

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/E2YTMK6XGJ6YFVFLRYFIVGU7XD \
  | 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: 26b1362bd7327d82d4ab8e0a8a9a9fb8c0efda47fd985bf30852d52462736641

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4255ad0245248a93035c0eee8c5aaf5d89db51ca537e7657af913b07476aa91d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2016-12-20T16:31:19Z",
    "title_canon_sha256": "822829c1b931fcf1f6e1be2fb84798790e56154e27e561482155f442e960dd17"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1612.06739",
    "kind": "arxiv",
    "version": 1
  }
}