Pith Number

pith:JBK3JRUG

pith:2020:JBK3JRUGOYFPYQ2T5DT3AM5XY3

not attested not anchored not stored refs pending

A new era of fine structure constant measurements at high redshift

Chung-Chi Lee, Dinko Milakovi\'c, John K. Webb, Luca Pasquini, Paolo Molaro, Robert F. Carswell

arxiv:2008.10619 v2 · 2020-08-24 · 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{JBK3JRUGOYFPYQ2T5DT3AM5XY3}

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	2026-07-05T02:20:29.493618Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4855b4c686760afc4353e8e7b033b7c6e8447bd609623621049c190c539241f8

Aliases

arxiv: 2008.10619 · arxiv_version: 2008.10619v2 · doi: 10.48550/arxiv.2008.10619 · pith_short_12: JBK3JRUGOYFP · pith_short_16: JBK3JRUGOYFPYQ2T · pith_short_8: JBK3JRUG

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/JBK3JRUGOYFPYQ2T5DT3AM5XY3 \
  | 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: 4855b4c686760afc4353e8e7b033b7c6e8447bd609623621049c190c539241f8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3ce98ed45dda59998a2a6ef06d91e9831860b3cdb6d506dec49fd902d37e207d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2020-08-24T18:00:14Z",
    "title_canon_sha256": "57ec267b64a82c45a31221dc794bec110c784fb8b08ca3fdc27af22357899a87"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2008.10619",
    "kind": "arxiv",
    "version": 2
  }
}