Pith Number

pith:4M6RFF2A

pith:2018:4M6RFF2AQ67JW5JY42EZO5ZPFW

not attested not anchored not stored refs pending

Testing the variation of the fine structure constant with strongly lensed gravitational waves

Hai-Nan Lin, Li-Li Wang, Li Tang, Xin Li

arxiv:1809.00474 v1 · 2018-09-03 · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4M6RFF2AQ67JW5JY42EZO5ZPFW}

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	2026-05-18T00:06:35.146880Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e33d12974087be9b7538e68997772f2d83ad95f1117bf4dc2c0d8b402cc7dfe0

Aliases

arxiv: 1809.00474 · arxiv_version: 1809.00474v1 · doi: 10.48550/arxiv.1809.00474 · pith_short_12: 4M6RFF2AQ67J · pith_short_16: 4M6RFF2AQ67JW5JY · pith_short_8: 4M6RFF2A

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/4M6RFF2AQ67JW5JY42EZO5ZPFW \
  | 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: e33d12974087be9b7538e68997772f2d83ad95f1117bf4dc2c0d8b402cc7dfe0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1fd430e3f96f8d53fe8d0b98e3d5a744efcf8d511456f55ae04708747aff04aa",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2018-09-03T07:35:24Z",
    "title_canon_sha256": "7b36d7b59d2d612146f5e42aaff7e76f07cbe0e240a7633b85051fa086dff8d7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.00474",
    "kind": "arxiv",
    "version": 1
  }
}