Pith Number

pith:UIFEQ3JS

pith:2018:UIFEQ3JSDVLF56GTGE755UXNSX

not attested not anchored not stored refs pending

Probing spatial variation of the fine-structure constant using the CMB

Daniel Grin, David Robinson, Davy Qi, Tristan L. Smith

arxiv:1808.07486 v1 · 2018-08-22 · astro-ph.CO · hep-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UIFEQ3JSDVLF56GTGE755UXNSX}

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	2026-05-17T23:52:41.168362Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a20a486d321d565ef8d3313fded2ed95f7c030b162ac8b972a0abc1d941e546e

Aliases

arxiv: 1808.07486 · arxiv_version: 1808.07486v1 · doi: 10.48550/arxiv.1808.07486 · pith_short_12: UIFEQ3JSDVLF · pith_short_16: UIFEQ3JSDVLF56GT · pith_short_8: UIFEQ3JS

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/UIFEQ3JSDVLF56GTGE755UXNSX \
  | 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: a20a486d321d565ef8d3313fded2ed95f7c030b162ac8b972a0abc1d941e546e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "60e4ba76cdc8bf6cfc53b38cdf2f83246fde7dd8357ca8f0cf0c593ef5ffcd1a",
    "cross_cats_sorted": [
      "hep-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2018-08-22T18:00:01Z",
    "title_canon_sha256": "c94197fc8198e1c2923cc2d00de6a82a433cf320a1c4e4b1f40c9fddb72a10d2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.07486",
    "kind": "arxiv",
    "version": 1
  }
}