Pith Number

pith:FUX5SM7Q

pith:2018:FUX5SM7QFKWDBAKLOZRVLR5PEM

not attested not anchored not stored refs pending

Hubble Law or Hubble-Lema\^itre Law? The IAU Resolution

Helge Kragh

arxiv:1809.02557 v1 · 2018-09-07 · physics.hist-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{FUX5SM7QFKWDBAKLOZRVLR5PEM}

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	2026-05-18T00:06:16.774522Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2d2fd933f02aac30814b766355c7af230b87dbb36400989acb8242d0289a854b

Aliases

arxiv: 1809.02557 · arxiv_version: 1809.02557v1 · doi: 10.48550/arxiv.1809.02557 · pith_short_12: FUX5SM7QFKWD · pith_short_16: FUX5SM7QFKWDBAKL · pith_short_8: FUX5SM7Q

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/FUX5SM7QFKWDBAKLOZRVLR5PEM \
  | 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: 2d2fd933f02aac30814b766355c7af230b87dbb36400989acb8242d0289a854b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6ecd3008957b05271653b1a92574600cdba36930d57c8075917d48786c40f428",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2018-09-07T16:05:23Z",
    "title_canon_sha256": "7d931c42c8ab834c3035d83fe80a388f91a08852038c8462acd2d2b543ef0067"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.02557",
    "kind": "arxiv",
    "version": 1
  }
}